1 | /* |
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2 | orxonox - the future of 3D-vertical-scrollers |
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3 | |
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4 | Copyright (C) 2004 orx |
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5 | |
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6 | This program is free software; you can redistribute it and/or modify |
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7 | it under the terms of the GNU General Public License as published by |
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8 | the Free Software Foundation; either version 2, or (at your option) |
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9 | any later version. |
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10 | |
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11 | ### File Specific: |
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12 | main-programmer: bottac@ee.ethz.ch |
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13 | */ |
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14 | |
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15 | #include "height_map.h" |
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16 | #include "model.h" |
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17 | #include "texture.h" |
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18 | #include "vector.h" |
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19 | #include "material.h" |
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20 | #include "p_node.h" |
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21 | #include "state.h" |
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22 | #include "resource_manager.h" |
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23 | #include "debug.h" |
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24 | |
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25 | // INCLUDING SDL_Image |
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26 | #ifdef HAVE_SDL_IMAGE_H |
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27 | #include <SDL_image.h> |
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28 | #else |
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29 | #include <SDL/SDL_image.h> |
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30 | #endif |
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31 | |
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32 | HeightMap::HeightMap() |
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33 | { |
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34 | |
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35 | } |
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36 | |
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37 | HeightMap::HeightMap(const char* height_map_name = NULL) |
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38 | { |
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39 | this->setClassID(CL_HEIGHT_MAP, "HeightMap"); |
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40 | heightMap = IMG_Load(height_map_name); |
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41 | if(heightMap!=NULL) { |
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42 | |
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43 | PRINTF(0)("loading Image %s\n", height_map_name); |
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44 | PRINTF(0)("width : %i\n", heightMap->w); |
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45 | PRINTF(0)("hight : %i\n", heightMap->h); |
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46 | PRINTF(0)("%i Byte(s) per Pixel \n", heightMap->format->BytesPerPixel); |
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47 | PRINTF(0)("Rshift : %i\n", heightMap->format->Rshift); |
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48 | PRINTF(0)("Bshift: %i\n", heightMap->format->Bshift); |
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49 | PRINTF(0)("Gshift: %i\n", heightMap->format->Gshift); |
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50 | PRINTF(0)("Rmask: %i\n", heightMap->format->Rmask); |
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51 | PRINTF(0)("Gmask: %i\n", heightMap->format->Gmask); |
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52 | } |
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53 | |
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54 | else PRINTF(4)("oops! couldn't load %s for some reason.\n", height_map_name); |
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55 | |
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56 | |
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57 | generateNormalVectorField(); |
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58 | |
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59 | |
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60 | //Defines 2 Materials (for testing only!) |
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61 | this->tmp_mat = new Material(); |
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62 | tmp_mat->setTransparency(1.0); |
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63 | tmp_mat->setIllum(0.3); |
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64 | tmp_mat->setDiffuse(0.55,0.4,0.2); |
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65 | tmp_mat->setAmbient(0.6,0.4,0.2); |
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66 | tmp_mat->setSpecular(0.02,0.02,0.02); |
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67 | tmp_mat->setShininess(.1); |
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68 | tmp_mat->setTransparency(1.0); |
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69 | |
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70 | tmp_mat->diffuseTexture = NULL; |
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71 | tmp_mat->ambientTexture = NULL; |
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72 | tmp_mat->specularTexture = NULL; |
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73 | |
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74 | this->red_mat = new Material(); |
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75 | red_mat->setTransparency(1.0); |
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76 | red_mat->setIllum(0.3); |
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77 | red_mat->setDiffuse(0.55,0.1,0.1); |
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78 | red_mat->setAmbient(0.55,0.1,0.1); |
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79 | red_mat->setSpecular(0.02,0.02,0.02); |
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80 | red_mat->setShininess(.1); |
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81 | red_mat->setTransparency(1.0); |
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82 | |
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83 | red_mat->diffuseTexture = NULL; |
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84 | red_mat->ambientTexture = NULL; |
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85 | red_mat->specularTexture = NULL; |
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86 | |
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87 | } |
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88 | |
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89 | HeightMap::HeightMap(const char* height_map_name = NULL, const char* colour_map_name = NULL) : VertexArrayModel() |
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90 | { |
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91 | this->setClassID(CL_HEIGHT_MAP, "HeightMap"); |
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92 | |
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93 | heightMap = IMG_Load(height_map_name); |
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94 | if(heightMap!=NULL) { |
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95 | |
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96 | PRINTF(0)("loading Image %s\n", height_map_name); |
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97 | PRINTF(0)("width : %i\n", heightMap->w); |
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98 | PRINTF(0)("hight : %i\n", heightMap->h); |
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99 | PRINTF(0)("%i Byte(s) per Pixel \n", heightMap->format->BytesPerPixel); |
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100 | PRINTF(0)("Rshift : %i\n", heightMap->format->Rshift); |
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101 | PRINTF(0)("Bshift: %i\n", heightMap->format->Bshift); |
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102 | PRINTF(0)("Gshift: %i\n", heightMap->format->Gshift); |
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103 | PRINTF(0)("Rmask: %i\n", heightMap->format->Rmask); |
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104 | PRINTF(0)("Gmask: %i\n", heightMap->format->Gmask); |
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105 | } |
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106 | |
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107 | else PRINTF(4)("oops! couldn't load %s for some reason.\n", height_map_name); |
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108 | |
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109 | |
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110 | generateNormalVectorField(); |
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111 | |
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112 | |
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113 | //Defines 2 Materials (for testing only!) |
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114 | this->tmp_mat = new Material("tmp"); |
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115 | tmp_mat->setTransparency(1.0); |
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116 | tmp_mat->setIllum(0.3); |
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117 | tmp_mat->setDiffuse(1.0,1.0,1.0); |
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118 | tmp_mat->setAmbient(1.0,1.0,1.0); |
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119 | |
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120 | tmp_mat->setSpecular(0.0,0.00,0.00); |
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121 | tmp_mat->setShininess(1.0); |
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122 | |
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123 | |
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124 | |
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125 | |
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126 | this->red_mat = new Material("red"); |
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127 | red_mat->setTransparency(1.0); |
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128 | red_mat->setIllum(3); |
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129 | red_mat->setDiffuse(0.55,0.1,0.1); |
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130 | red_mat->setAmbient(0.55,0.1,0.1); |
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131 | red_mat->setSpecular(0.0,0.0,0.0); |
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132 | red_mat->setShininess(1.0); |
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133 | red_mat->setTransparency(1.0); |
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134 | |
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135 | // red_mat->diffuseTexture = NULL; |
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136 | // red_mat->ambientTexture = NULL; |
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137 | //red_mat->specularTexture = NULL; |
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138 | |
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139 | if(colour_map_name != NULL) |
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140 | { |
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141 | colourMap = IMG_Load(colour_map_name); |
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142 | if(colourMap != NULL) |
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143 | { |
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144 | PRINTF(0)("loading Image %s\n", colour_map_name); |
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145 | PRINTF(0)("width : %i\n", colourMap->w); |
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146 | PRINTF(0)("hight : %i\n", colourMap->h); |
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147 | PRINTF(0)("%i Byte(s) per Pixel \n", colourMap->format->BytesPerPixel); |
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148 | PRINTF(0)("Rshift : %i\n", colourMap->format->Rshift); |
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149 | PRINTF(0)("Bshift: %i\n", colourMap->format->Bshift); |
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150 | PRINTF(0)("Gshift: %i\n", colourMap->format->Gshift); |
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151 | PRINTF(0)("Rmask: %i\n", colourMap->format->Rmask); |
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152 | PRINTF(0)("Gmask: %i\n", colourMap->format->Gmask); |
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153 | } |
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154 | else PRINTF(4)("oops! couldn't load %s for some reason.\n", colour_map_name); |
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155 | |
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156 | const char* texture_name = "pictures/ground1.tga"; |
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157 | tmp_mat->setDiffuseMap(texture_name); |
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158 | if(colourMap != NULL) |
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159 | { |
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160 | colours = (unsigned char *) colourMap->pixels; |
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161 | hasColourMap = true; |
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162 | } |
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163 | else |
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164 | { |
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165 | hasColourMap = false; |
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166 | |
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167 | |
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168 | } |
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169 | |
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170 | // tmp_mat->setAmbientMap(texture_name); |
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171 | //tmp_mat->setSpecularMap(texture_name); |
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172 | |
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173 | // red_mat->setDiffuseMap(texture_name); |
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174 | // red_mat->setAmbientMap(texture_name); |
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175 | //red_mat->setSpecularMap(texture_name); |
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176 | } |
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177 | |
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178 | |
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179 | } |
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180 | HeightMap::~HeightMap() |
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181 | { |
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182 | delete heightMap; |
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183 | } |
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184 | |
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185 | void HeightMap::load() |
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186 | { |
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187 | |
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188 | this->camera = State::getCamera(); |
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189 | this->camCoords = this->camera->getAbsCoor(); |
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190 | float x = this->camCoords.x + 300; |
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191 | float y = this->camCoords.z + 100; |
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192 | |
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193 | tmp_mat->select(); |
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194 | |
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195 | unsigned char height = 0; |
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196 | int offset = 0; |
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197 | int g = 0; |
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198 | float old_r = 0.0f; |
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199 | float old_g = 0.0f; |
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200 | float old_b = 0.0f; |
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201 | heights = (unsigned char*) heightMap->pixels; |
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202 | bool colourChanged = true; |
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203 | |
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204 | |
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205 | /* |
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206 | if(heightMap != NULL && heightMap->format->BitsPerPixel == 8 ) |
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207 | {} |
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208 | SDL_LockSurface(heightMap); |
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209 | |
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210 | |
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211 | |
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212 | for(int i = 0 ; i < heightMap->h -sampleRate ; i +=sampleRate) |
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213 | { |
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214 | |
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215 | tmp_mat->select(); |
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216 | |
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217 | |
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218 | |
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219 | int j = 0; |
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220 | |
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221 | |
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222 | for(int j = 0 ; j < heightMap->w -sampleRate ; j += sampleRate) |
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223 | { |
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224 | if(true) |
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225 | { |
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226 | float r = (float)colours[3*j+2 + 3*i*(heightMap->w )]; |
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227 | float g = (float)colours[3*j+1 + 3*i*(heightMap->w)]; |
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228 | float b = (float)colours[3*j+0 + 3*i*(heightMap->w)]; |
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229 | colourChanged = old_r != r || old_g != g || old_b != b; |
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230 | old_r = r; |
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231 | old_g = g; |
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232 | old_b = b; |
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233 | if(colourChanged) |
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234 | { |
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235 | tmp_mat->setAmbient(r/255.0,g/255.0,b/255.0); |
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236 | tmp_mat->setDiffuse(r/255.0,g/255.0,b/255.0); |
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237 | tmp_mat->select(); |
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238 | } |
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239 | } |
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240 | |
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241 | |
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242 | height = heights[j+sampleRate + i*(heightMap->w )]; |
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243 | this->addNormal(normalVectorField[i][j+sampleRate].y,normalVectorField[i][j+sampleRate].z,normalVectorField[i][j+2].x); |
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244 | this->addTexCoor(((j/sampleRate)%4)/4.0,((i/sampleRate)%4)/4.0); |
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245 | |
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246 | this->addVertex(scaleX*(heightMap->h -i),(double)((double)(height)*scaleY),scaleZ*(j+sampleRate)); // Top Right |
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247 | |
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248 | |
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249 | |
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250 | } |
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251 | |
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252 | |
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253 | |
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254 | |
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255 | |
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256 | |
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257 | |
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258 | |
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259 | |
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260 | } |
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261 | |
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262 | |
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263 | |
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264 | SDL_UnlockSurface(heightMap); |
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265 | |
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266 | |
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267 | int cnt = 0; |
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268 | for(int i = 0 ; i < heightMap->h -sampleRate ; i +=sampleRate) |
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269 | { |
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270 | |
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271 | for(int j = 0 ; j < heightMap->w -sampleRate ; j += sampleRate) |
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272 | { |
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273 | |
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274 | this->addIndice(cnt); |
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275 | cnt ++; |
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276 | } |
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277 | if(i%2 == 1) |
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278 | { |
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279 | this->newStripe(); |
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280 | } |
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281 | } |
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282 | |
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283 | |
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284 | |
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285 | |
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286 | */ |
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287 | |
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288 | this->planeModel(); |
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289 | |
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290 | this->finalize(); |
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291 | |
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292 | |
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293 | } |
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294 | |
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295 | /* |
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296 | void HeightMap::draw() |
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297 | { |
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298 | |
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299 | this->camera = State::getCamera(); |
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300 | this->camCoords = this->camera->getAbsCoor(); |
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301 | float x = this->camCoords.x + 300; |
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302 | float y = this->camCoords.z + 100; |
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303 | |
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304 | // Draw a red rectangle to test getHeight |
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305 | |
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306 | red_mat->select(); |
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307 | glBegin(GL_TRIANGLE_STRIP); |
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308 | glNormal3f(0,1,0); |
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309 | glTexCoord2d(1.0,0.0); |
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310 | glVertex3f(x-10,getHeight(x-10,y+10)+5.0f ,y+10); // Top Left |
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311 | |
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312 | |
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313 | glNormal3f(0,1,0); |
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314 | glTexCoord2d(1.0,1.0); |
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315 | glVertex3f(x+10,getHeight(x+10,y+10)+5.0f ,y+10); // Top Left |
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316 | |
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317 | |
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318 | glNormal3f(0,1,0); |
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319 | glTexCoord2d(0.0,0.0); |
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320 | glVertex3f(x-10,getHeight(x-10,y-10)+5.0f ,y-10); // Top Left |
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321 | |
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322 | |
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323 | glNormal3f(0,1,0); |
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324 | glTexCoord2d(0.0,1.0); |
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325 | glVertex3f(x+10,getHeight(x+10,y-10)+5.0f ,y-10); // Top Left |
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326 | |
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327 | glEnd(); |
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328 | |
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329 | tmp_mat->select(); |
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330 | |
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331 | unsigned char height = 0; |
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332 | int offset = 0; |
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333 | int g = 0; |
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334 | float old_r = 0.0f; |
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335 | float old_g = 0.0f; |
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336 | float old_b = 0.0f; |
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337 | heights = (unsigned char*) heightMap->pixels; |
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338 | |
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339 | bool colourChanged = true; |
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340 | |
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341 | if(heightMap != NULL && heightMap->format->BitsPerPixel == 8 ) |
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342 | { |
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343 | SDL_LockSurface(heightMap); |
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344 | |
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345 | glBegin(GL_TRIANGLE_STRIP); |
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346 | for(int i = 0 ; i < heightMap->h -sampleRate ; i +=sampleRate) |
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347 | { |
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348 | |
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349 | |
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350 | |
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351 | |
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352 | int j = 0; |
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353 | |
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354 | /* |
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355 | height = heights[j + i*(heightMap->w )]; |
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356 | glNormal3f(normalVectorField[i][j].y,normalVectorField[i][j].z,normalVectorField[i][j].x); |
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357 | glVertex3f(20*(heightMap->h -(i))-1000,(double)((double)(height)/1-300),20*(j)-1000); // Top Left |
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358 | |
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359 | height = heights[j + (i+2)*(heightMap->w )]; |
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360 | glNormal3f(normalVectorField[i+2][j].y,normalVectorField[i+2][j].z,normalVectorField[i+2][j].x); |
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361 | glVertex3f(20*(heightMap->h -(i+2))-1000,(double)((double)(height)/1-300),20*(j)-1000); // Bottom Left |
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362 | |
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363 | */ |
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364 | /* |
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365 | for(int j = 0 ; j < heightMap->w -sampleRate ; j += sampleRate) |
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366 | { |
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367 | if(hasColourMap) |
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368 | { |
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369 | float r = (float)colours[3*j+2 + 3*i*(heightMap->w )]; |
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370 | float g = (float)colours[3*j+1 + 3*i*(heightMap->w)]; |
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371 | float b = (float)colours[3*j+0 + 3*i*(heightMap->w)]; |
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372 | colourChanged = old_r != r || old_g != g || old_b != b; |
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373 | old_r = r; |
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374 | old_g = g; |
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375 | old_b = b; |
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376 | if(colourChanged) |
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377 | { |
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378 | tmp_mat->setAmbient(r/255.0,g/255.0,b/255.0); |
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379 | tmp_mat->setDiffuse(r/255.0,g/255.0,b/255.0); |
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380 | tmp_mat->select(); |
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381 | } |
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382 | } |
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383 | */ |
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384 | //if(true/*(abs(-scaleX*i-x+5000) > 1100 || abs(scaleZ*j-y-2000) > 1100 )*/){ //subdivide?? |
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385 | /* |
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386 | height = heights[j+sampleRate + i*(heightMap->w )]; |
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387 | glNormal3f(normalVectorField[i][j+sampleRate].y,normalVectorField[i][j+sampleRate].z,normalVectorField[i][j+2].x); |
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388 | glTexCoord2f(((j/sampleRate)%4)/4.0,((i/sampleRate)%4)/4.0); |
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389 | |
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390 | glVertex3f(scaleX*(heightMap->h -i),(double)((double)(height)*scaleY),scaleZ*(j+sampleRate)); // Top Right |
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391 | |
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392 | height = heights[j+sampleRate + (i+sampleRate)*(heightMap->w )]; |
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393 | glNormal3f(normalVectorField[i+sampleRate][j+sampleRate].y,normalVectorField[i+sampleRate][j+sampleRate].z,normalVectorField[i+sampleRate][j+sampleRate].x); |
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394 | glTexCoord2f(((j/sampleRate)%4)/4.0,1/4.0+((i/sampleRate)%4)/4.0); |
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395 | //glTexCoord2f(0.0,0.0); |
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396 | glVertex3f(scaleX*(heightMap->h -(i+sampleRate)),(double)((double)(height)*scaleY),scaleZ*(j+sampleRate)); // Bottom Right |
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397 | |
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398 | } |
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399 | else |
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400 | { |
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401 | //red_mat->select(); |
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402 | //glEnd(); |
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403 | |
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404 | |
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405 | |
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406 | glBegin(GL_TRIANGLE_STRIP); |
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407 | |
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408 | drawRect(j,i+sampleRate/2,j+sampleRate/2,i); |
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409 | glEnd(); |
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410 | glBegin(GL_TRIANGLE_STRIP); |
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411 | |
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412 | |
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413 | drawRect(j+sampleRate/2,i+sampleRate/2,j+sampleRate,i); |
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414 | glEnd(); |
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415 | glBegin(GL_TRIANGLE_STRIP); |
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416 | |
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417 | |
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418 | drawRect(j,i+sampleRate,j+sampleRate/2,i+sampleRate/2); |
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419 | glEnd(); |
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420 | glBegin(GL_TRIANGLE_STRIP); |
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421 | drawRect(j+sampleRate/2,i+sampleRate,j+sampleRate,i+sampleRate/2); |
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422 | |
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423 | glEnd(); |
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424 | |
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425 | |
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426 | |
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427 | |
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428 | |
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429 | //subdivide |
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430 | } |
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431 | |
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432 | |
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433 | } |
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434 | j = heightMap->w -sampleRate; |
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435 | |
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436 | |
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437 | glNormal3f(normalVectorField[i+sampleRate][j+sampleRate].y,normalVectorField[i+sampleRate][j+sampleRate].z,normalVectorField[i+sampleRate][j+sampleRate].x); |
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438 | //glTexCoord2f(((j/sampleRate)%4)/4.0,1/4.0+((i/sampleRate)%4)/4.0); |
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439 | //glTexCoord2f(0.0,0.0); |
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440 | glTexCoord2f(((j/sampleRate)%4)/4.0,((i/sampleRate)%4)/4.0); |
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441 | glVertex3f(scaleX*(heightMap->h -i),(double)((double)-1000.0),scaleZ*(j+sampleRate)); // Top Right |
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442 | |
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443 | glNormal3f(normalVectorField[i+sampleRate][j+sampleRate].y,normalVectorField[i+sampleRate][j+sampleRate].z,normalVectorField[i+sampleRate][j+sampleRate].x); |
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444 | glTexCoord2f(((j/sampleRate)%4)/4.0,1/4.0+((i/sampleRate)%4)/4.0); |
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445 | |
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446 | glVertex3f(scaleX*(heightMap->h -(i+sampleRate)),(double)-1000.0,scaleZ*(j+sampleRate)); // Bottom Right |
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447 | |
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448 | |
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449 | |
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450 | |
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451 | |
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452 | //glEnd(); |
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453 | |
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454 | } |
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455 | SDL_UnlockSurface(heightMap); |
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456 | glEnd(); |
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457 | } |
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458 | |
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459 | } |
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460 | */ |
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461 | void HeightMap::generateNormalVectorField() |
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462 | { |
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463 | int delta = 1; |
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464 | heights = (unsigned char*) heightMap->pixels; |
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465 | |
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466 | //Create a Dynamicly sized 2D-Array to store our normals |
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467 | normalVectorField = new Vector* [heightMap->h]; |
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468 | for(int i=0;i<heightMap->h;i++) |
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469 | normalVectorField [i]= new (Vector [heightMap->w]); |
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470 | |
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471 | |
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472 | |
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473 | // !!! Does not yet calculate any normals for some border points!!!!! |
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474 | |
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475 | if(heightMap != NULL && heightMap->format->BitsPerPixel == 8 ) |
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476 | { |
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477 | SDL_LockSurface(heightMap); |
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478 | for(int i = 0 ; i < heightMap->h -1 ; i ++) |
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479 | { |
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480 | for(int j = 0; j < heightMap->w -1 ; j ++) |
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481 | { |
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482 | |
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483 | |
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484 | delta = (int)heights[j + (i+1)*(heightMap->w )] - (int) heights[j + i*(heightMap->w )]; |
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485 | Vector a = Vector(-20.0,(float)delta ,0.0f); |
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486 | |
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487 | delta = (int)heights[j+1 + i*(heightMap->w )] - (int)heights[j + i*(heightMap->w )]; |
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488 | Vector b = Vector(0.0f,(float) delta ,20.0); |
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489 | |
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490 | |
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491 | normalVectorField[i][j] = b.cross(a); |
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492 | normalVectorField[i][j].normalize(); |
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493 | |
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494 | } |
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495 | } |
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496 | SDL_UnlockSurface(heightMap); |
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497 | |
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498 | } |
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499 | |
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500 | } |
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501 | |
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502 | void HeightMap::drawRect(int xBottom, int yBottom, int xTop, int yTop ) |
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503 | { |
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504 | int height = 0; |
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505 | if(true) |
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506 | { |
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507 | |
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508 | height = heights[xTop + yTop*(heightMap->w )]; |
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509 | glNormal3f(normalVectorField[yTop][xTop].y,normalVectorField[yTop][xTop].z,normalVectorField[yTop][xTop].x); |
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510 | glTexCoord2f(((yBottom/sampleRate)%8)/8.0+0.125,((xBottom/sampleRate)%8)/8.0+0.125); |
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511 | glVertex3f(scaleX*(heightMap->h - yTop),(double)((double)(height)*scaleY),scaleZ*(xTop)); // Top Right |
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512 | |
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513 | height = heights[xBottom + yTop*(heightMap->w )]; |
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514 | glNormal3f(normalVectorField[yTop][xBottom].y,normalVectorField[yTop][xBottom].z,normalVectorField[yTop][xBottom].x); |
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515 | glTexCoord2f(((yBottom/sampleRate)%8)/8.0,((xBottom/sampleRate)%8)/8.0+0.125); |
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516 | glVertex3f(scaleX*(heightMap->h -(yTop)),(double)((double)(height)*scaleY),scaleZ*(xBottom)); // Top Left |
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517 | |
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518 | height = heights[xTop + (yBottom)*(heightMap->w )]; |
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519 | glNormal3f(normalVectorField[yBottom][xTop].y,normalVectorField[yBottom][xTop].z,normalVectorField[yBottom][xTop].x); |
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520 | glTexCoord2f(((yBottom/sampleRate)%8)/8.0+0.125,((yBottom/sampleRate)%8)/8.0); |
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521 | glVertex3f(scaleX*(heightMap->h -(yBottom)),(double)((double)(height)*scaleY),scaleZ*(xTop)); // Bottom Right |
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522 | |
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523 | height = heights[xBottom + (yBottom)*(heightMap->w )]; |
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524 | glNormal3f(normalVectorField[yBottom][xBottom].y,normalVectorField[yBottom][xBottom].z,normalVectorField[yBottom][xBottom].x); |
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525 | glTexCoord2f(((yBottom/sampleRate)%8)/8.0,((yBottom/sampleRate)%8)/8.0); |
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526 | glVertex3f(scaleX*(heightMap->h -(yBottom)),(double)((double)(height)*scaleY),scaleZ*(xBottom)); // Bottom Left |
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527 | |
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528 | |
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529 | |
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530 | } |
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531 | else |
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532 | { |
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533 | // subdivide |
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534 | } |
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535 | |
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536 | } |
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537 | |
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538 | |
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539 | void HeightMap::fixBoarder(int xBottomLeft, int yBottomLeft, int xTopRight, int yTopRight) |
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540 | { |
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541 | |
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542 | int height = 0; |
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543 | |
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544 | for(int i= xTopRight; i < xBottomLeft ; i+= sampleRate) |
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545 | { |
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546 | |
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547 | glBegin(GL_TRIANGLES); |
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548 | |
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549 | height = heights[yBottomLeft + (i + sampleRate)*(heightMap->w )]; |
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550 | glNormal3f(0,1,0); |
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551 | glVertex3f(scaleX*(heightMap->h -i-sampleRate),scaleY*height,scaleZ*(yBottomLeft)); |
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552 | |
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553 | height = heights[yBottomLeft + i*(heightMap->w )]; |
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554 | glNormal3f(0,1,0); |
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555 | glVertex3f(scaleX*(heightMap->h -i),scaleY*height,scaleZ*(yBottomLeft)); |
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556 | |
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557 | height = heights[yBottomLeft + (i + sampleRate/2)*(heightMap->w )]; |
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558 | glNormal3f(0,1,0); |
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559 | glVertex3f(scaleX*(heightMap->h -i - sampleRate/2),scaleY*height,scaleZ*(yBottomLeft)); |
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560 | |
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561 | |
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562 | |
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563 | glEnd(); |
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564 | |
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565 | |
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566 | |
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567 | |
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568 | } |
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569 | for(int j= yBottomLeft; j < yTopRight; j+= sampleRate) |
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570 | { |
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571 | glBegin(GL_TRIANGLES); |
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572 | height = heights[j + (xBottomLeft+sampleRate)*(heightMap->w )]; |
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573 | glNormal3f(-1,0,0); |
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574 | glVertex3f(scaleX*(heightMap->h -xBottomLeft -sampleRate),scaleY*height,scaleZ*(j)); |
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575 | |
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576 | height = heights[j + sampleRate/2 + (xBottomLeft + sampleRate)*(heightMap->w )]; |
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577 | glNormal3f(-1,0,0); |
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578 | glVertex3f(scaleX*(heightMap->h -xBottomLeft - sampleRate),scaleY*height,scaleZ*(j+sampleRate/2)); |
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579 | |
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580 | height = heights[j + sampleRate + (xBottomLeft + sampleRate)*(heightMap->w )]; |
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581 | glNormal3f(-1,0,0); |
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582 | glVertex3f(scaleX*(heightMap->h -xBottomLeft-sampleRate),scaleY*height,scaleZ*(j+sampleRate)); |
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583 | |
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584 | glEnd(); |
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585 | } |
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586 | } |
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587 | |
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588 | void HeightMap::scale(Vector v) |
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589 | { |
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590 | scaleX = v.x; |
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591 | scaleY = v.y; |
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592 | scaleZ = v.z; |
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593 | } |
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594 | |
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595 | // Accepts Coordinates relative to HeightMap |
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596 | float HeightMap::getHeight(float x, float y) |
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597 | { |
---|
598 | int xInt = (int)x / scaleX; x -= (float)xInt*scaleX; xInt = heightMap->h - xInt; |
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599 | int yInt = (int)y / scaleZ; y -= (float)yInt*scaleZ; |
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600 | if(xInt <= 0 || xInt >= heightMap->h || yInt <= 0 || yInt >= heightMap->w ) return 0.0f; |
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601 | float height = heights[yInt + (xInt)*heightMap->w]*scaleY; |
---|
602 | float a = normalVectorField[(xInt)][yInt].x; |
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603 | float b = normalVectorField [(xInt)][yInt].z; |
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604 | float c = normalVectorField [(xInt)][yInt].y; |
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605 | height -= ( (a/c)*(x) + (b/c)*(y))*scaleY; |
---|
606 | return height; |
---|
607 | } |
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