1 | |
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2 | /* |
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3 | ----------------------------------------------------------------------------- |
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4 | This source file is part of GIMPACT Library. |
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5 | |
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6 | For the latest info, see http://gimpact.sourceforge.net/ |
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7 | |
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8 | Copyright (c) 2006 Francisco Leon. C.C. 80087371. |
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9 | email: projectileman@yahoo.com |
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10 | |
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11 | This library is free software; you can redistribute it and/or |
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12 | modify it under the terms of EITHER: |
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13 | (1) The GNU Lesser General Public License as published by the Free |
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14 | Software Foundation; either version 2.1 of the License, or (at |
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15 | your option) any later version. The text of the GNU Lesser |
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16 | General Public License is included with this library in the |
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17 | file GIMPACT-LICENSE-LGPL.TXT. |
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18 | (2) The BSD-style license that is included with this library in |
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19 | the file GIMPACT-LICENSE-BSD.TXT. |
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20 | |
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21 | This library is distributed in the hope that it will be useful, |
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22 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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23 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the files |
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24 | GIMPACT-LICENSE-LGPL.TXT and GIMPACT-LICENSE-BSD.TXT for more details. |
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25 | |
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26 | ----------------------------------------------------------------------------- |
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27 | */ |
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28 | |
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29 | |
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30 | #include <assert.h> |
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31 | #include "GIMPACT/gim_trimesh.h" |
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32 | |
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33 | GUINT gim_trimesh_get_triangle_count(GIM_TRIMESH * trimesh) |
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34 | { |
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35 | return trimesh->m_tri_index_buffer.m_element_count/3; |
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36 | } |
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37 | |
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38 | //! Creates the aabb set and the triangles cache |
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39 | /*! |
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40 | |
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41 | \param trimesh |
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42 | \param vertex_array |
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43 | \param triindex_array |
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44 | \param transformed_reply If 1, then the m_transformed_vertices is a reply of the source vertices. Else it just be a reference to the original array. |
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45 | \post it copies the arrays by reference, and creates the auxiliary data (m_aabbset,m_planes_cache_buffer) |
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46 | */ |
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47 | void gim_trimesh_create_from_arrays(GIM_TRIMESH * trimesh, GBUFFER_ARRAY * vertex_array, GBUFFER_ARRAY * triindex_array,char transformed_reply) |
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48 | { |
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49 | assert(trimesh); |
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50 | assert(vertex_array); |
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51 | assert(triindex_array); |
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52 | gim_buffer_array_copy_ref(vertex_array,&trimesh->m_source_vertex_buffer); |
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53 | gim_buffer_array_copy_ref(triindex_array,&trimesh->m_tri_index_buffer); |
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54 | |
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55 | trimesh->m_mask = GIM_TRIMESH_NEED_UPDATE;//needs update |
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56 | //Create the transformed vertices |
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57 | if(transformed_reply==1) |
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58 | { |
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59 | trimesh->m_mask |= GIM_TRIMESH_TRANSFORMED_REPLY; |
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60 | gim_buffer_array_copy_value(vertex_array,&trimesh->m_transformed_vertex_buffer,G_BUFFER_MANAGER_SYSTEM,G_MU_DYNAMIC_READ_WRITE); |
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61 | } |
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62 | else |
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63 | { |
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64 | gim_buffer_array_copy_ref(vertex_array,&trimesh->m_transformed_vertex_buffer); |
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65 | } |
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66 | //create the box set |
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67 | GUINT facecount = gim_trimesh_get_triangle_count(trimesh); |
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68 | |
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69 | gim_aabbset_alloc(&trimesh->m_aabbset,facecount); |
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70 | //create the planes cache |
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71 | GIM_DYNARRAY_CREATE_SIZED(GIM_TRIPLANES_CACHE,trimesh->m_planes_cache_buffer,facecount); |
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72 | //Create the bitset |
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73 | GIM_BITSET_CREATE_SIZED(trimesh->m_planes_cache_bitset,facecount); |
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74 | //Callback is 0 |
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75 | trimesh->m_update_callback = 0; |
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76 | //set to identity |
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77 | IDENTIFY_MATRIX_4X4(trimesh->m_transform); |
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78 | } |
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79 | |
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80 | |
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81 | |
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82 | //! Create a trimesh from vertex array and an index array |
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83 | /*! |
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84 | |
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85 | \param trimesh An uninitialized GIM_TRIMESH structure |
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86 | \param vertex_array A buffer to a vec3f array |
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87 | \param vertex_count |
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88 | \param triindex_array |
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89 | \param index_count |
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90 | \param copy_vertices If 1, it copies the source vertices in another buffer. Else (0) it constructs a reference to the data. |
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91 | \param copy_indices If 1, it copies the source vertices in another buffer. Else (0) it constructs a reference to the data. |
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92 | \param transformed_reply If , then the m_transformed_vertices is a reply of the source vertices. Else it just be a reference to the original array. |
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93 | */ |
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94 | void gim_trimesh_create_from_data(GIM_TRIMESH * trimesh, vec3f * vertex_array, GUINT vertex_count,char copy_vertices, GUINT * triindex_array, GUINT index_count,char copy_indices,char transformed_reply) |
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95 | { |
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96 | GBUFFER_ARRAY buffer_vertex_array; |
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97 | GBUFFER_ARRAY buffer_triindex_array; |
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98 | |
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99 | //Create vertices |
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100 | if(copy_vertices == 1) |
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101 | { |
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102 | gim_create_common_buffer_from_data(vertex_array, vertex_count*sizeof(vec3f), &buffer_vertex_array.m_buffer_id); |
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103 | } |
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104 | else//Create a shared buffer |
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105 | { |
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106 | gim_create_shared_buffer_from_data(vertex_array, vertex_count*sizeof(vec3f), &buffer_vertex_array.m_buffer_id); |
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107 | } |
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108 | GIM_BUFFER_ARRAY_INIT_TYPE(vec3f,buffer_vertex_array,buffer_vertex_array.m_buffer_id,vertex_count); |
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109 | |
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110 | |
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111 | //Create vertices |
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112 | if(copy_indices == 1) |
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113 | { |
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114 | gim_create_common_buffer_from_data(triindex_array, index_count*sizeof(GUINT), &buffer_triindex_array.m_buffer_id); |
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115 | } |
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116 | else//Create a shared buffer |
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117 | { |
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118 | gim_create_shared_buffer_from_data(triindex_array, index_count*sizeof(GUINT), &buffer_triindex_array.m_buffer_id); |
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119 | } |
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120 | GIM_BUFFER_ARRAY_INIT_TYPE(GUINT,buffer_triindex_array,buffer_triindex_array.m_buffer_id,index_count); |
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121 | |
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122 | gim_trimesh_create_from_arrays(trimesh, &buffer_vertex_array, &buffer_triindex_array,transformed_reply); |
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123 | |
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124 | ///always call this after create a buffer_array |
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125 | GIM_BUFFER_ARRAY_DESTROY(buffer_vertex_array); |
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126 | GIM_BUFFER_ARRAY_DESTROY(buffer_triindex_array); |
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127 | } |
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128 | |
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129 | //! Clears auxiliary data and releases buffer arrays |
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130 | void gim_trimesh_destroy(GIM_TRIMESH * trimesh) |
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131 | { |
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132 | gim_aabbset_destroy(&trimesh->m_aabbset); |
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133 | |
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134 | GIM_DYNARRAY_DESTROY(trimesh->m_planes_cache_buffer); |
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135 | GIM_DYNARRAY_DESTROY(trimesh->m_planes_cache_bitset); |
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136 | |
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137 | GIM_BUFFER_ARRAY_DESTROY(trimesh->m_transformed_vertex_buffer); |
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138 | GIM_BUFFER_ARRAY_DESTROY(trimesh->m_source_vertex_buffer); |
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139 | GIM_BUFFER_ARRAY_DESTROY(trimesh->m_tri_index_buffer); |
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140 | } |
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141 | |
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142 | //! Copies two meshes |
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143 | /*! |
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144 | \pre dest_trimesh shouldn't be created |
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145 | \post dest_trimesh will be created |
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146 | \param source_trimesh |
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147 | \param dest_trimesh |
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148 | \param copy_by_reference If 1, it attach a reference to the source vertices, else it copies the vertices |
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149 | \param transformed_reply IF 1, then it forces the m_trasnformed_vertices to be a reply of the source vertices |
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150 | */ |
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151 | void gim_trimesh_copy(GIM_TRIMESH * source_trimesh,GIM_TRIMESH * dest_trimesh, char copy_by_reference, char transformed_reply) |
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152 | { |
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153 | if(copy_by_reference==1) |
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154 | { |
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155 | gim_trimesh_create_from_arrays(dest_trimesh, &source_trimesh->m_source_vertex_buffer, &source_trimesh->m_tri_index_buffer,transformed_reply); |
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156 | } |
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157 | else |
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158 | { |
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159 | GBUFFER_ARRAY buffer_vertex_array; |
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160 | GBUFFER_ARRAY buffer_triindex_array; |
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161 | |
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162 | gim_buffer_array_copy_value(&source_trimesh->m_source_vertex_buffer,&buffer_vertex_array,G_BUFFER_MANAGER_SYSTEM,G_MU_DYNAMIC_READ_WRITE); |
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163 | |
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164 | gim_buffer_array_copy_value(&source_trimesh->m_tri_index_buffer,&buffer_triindex_array,G_BUFFER_MANAGER_SYSTEM,G_MU_DYNAMIC_READ_WRITE); |
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165 | |
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166 | gim_trimesh_create_from_arrays(dest_trimesh, &buffer_vertex_array, &buffer_triindex_array,transformed_reply); |
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167 | |
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168 | ///always call this after create a buffer_array |
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169 | GIM_BUFFER_ARRAY_DESTROY(buffer_vertex_array); |
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170 | GIM_BUFFER_ARRAY_DESTROY(buffer_triindex_array); |
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171 | } |
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172 | } |
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173 | |
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174 | //! Locks the trimesh for working with it |
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175 | /*! |
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176 | \post locks m_tri_index_buffer and m_transformed_vertex_buffer. |
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177 | \param trimesh |
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178 | */ |
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179 | void gim_trimesh_locks_work_data(GIM_TRIMESH * trimesh) |
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180 | { |
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181 | GINT res; |
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182 | res=gim_buffer_array_lock(&trimesh->m_tri_index_buffer,G_MA_READ_ONLY); |
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183 | assert(res==G_BUFFER_OP_SUCCESS); |
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184 | res=gim_buffer_array_lock(&trimesh->m_transformed_vertex_buffer,G_MA_READ_ONLY); |
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185 | assert(res==G_BUFFER_OP_SUCCESS); |
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186 | } |
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187 | |
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188 | //! unlocks the trimesh |
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189 | /*! |
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190 | \post unlocks m_tri_index_buffer and m_transformed_vertex_buffer. |
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191 | \param trimesh |
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192 | */ |
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193 | void gim_trimesh_unlocks_work_data(GIM_TRIMESH * trimesh) |
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194 | { |
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195 | gim_buffer_array_unlock(&trimesh->m_tri_index_buffer); |
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196 | gim_buffer_array_unlock(&trimesh->m_transformed_vertex_buffer); |
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197 | } |
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198 | |
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199 | |
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200 | //! Returns 1 if the m_transformed_vertex_buffer is a reply of m_source_vertex_buffer |
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201 | char gim_trimesh_has_tranformed_reply(GIM_TRIMESH * trimesh) |
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202 | { |
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203 | if(trimesh->m_mask&GIM_TRIMESH_TRANSFORMED_REPLY) return 1; |
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204 | return 0; |
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205 | } |
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206 | |
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207 | //! Returns 1 if the trimesh needs to update their aabbset and the planes cache. |
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208 | char gim_trimesh_needs_update(GIM_TRIMESH * trimesh) |
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209 | { |
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210 | if(trimesh->m_mask&GIM_TRIMESH_NEED_UPDATE) return 1; |
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211 | return 0; |
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212 | } |
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213 | |
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214 | //! Change the state of the trimesh for force it to update |
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215 | /*! |
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216 | Call it after made changes to the trimesh. |
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217 | \post gim_trimesh_need_update(trimesh) will return 1 |
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218 | */ |
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219 | void gim_trimesh_post_update(GIM_TRIMESH * trimesh) |
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220 | { |
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221 | trimesh->m_mask |= GIM_TRIMESH_NEED_UPDATE; |
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222 | } |
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223 | |
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224 | //kernel |
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225 | #define MULT_MAT_VEC4_KERNEL(_mat,_src,_dst) MAT_DOT_VEC_3X4((_dst),(_mat),(_src)) |
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226 | |
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227 | //! Updates m_transformed_vertex_buffer |
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228 | /*! |
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229 | \pre m_transformed_vertex_buffer must be unlocked |
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230 | */ |
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231 | void gim_trimesh_update_vertices(GIM_TRIMESH * trimesh) |
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232 | { |
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233 | if(gim_trimesh_has_tranformed_reply(trimesh) == 0) return; //Don't perform transformation |
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234 | |
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235 | //Vertices |
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236 | GBUFFER_ARRAY * psource_vertex_buffer = &trimesh->m_source_vertex_buffer; |
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237 | GBUFFER_ARRAY * ptransformed_vertex_buffer = &trimesh->m_transformed_vertex_buffer; |
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238 | //Temp transform |
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239 | mat4f transform; |
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240 | COPY_MATRIX_4X4(transform,trimesh->m_transform); |
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241 | |
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242 | GIM_PROCESS_BUFFER_ARRAY(transform,(*psource_vertex_buffer),(*ptransformed_vertex_buffer),MULT_MAT_VEC4_KERNEL,vec3f,vec3f); |
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243 | } |
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244 | |
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245 | //! Updates m_aabbset and m_planes_cache_bitset |
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246 | /*! |
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247 | \pre gim_trimesh_locks_work_data must be called before |
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248 | */ |
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249 | void gim_trimesh_update_aabbset(GIM_TRIMESH * trimesh) |
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250 | { |
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251 | vec3f * transformed_vertices = GIM_BUFFER_ARRAY_POINTER(vec3f,trimesh->m_transformed_vertex_buffer,0); |
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252 | assert(transformed_vertices); |
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253 | |
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254 | GUINT * triangle_indices = GIM_BUFFER_ARRAY_POINTER(GUINT,trimesh->m_tri_index_buffer,0); |
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255 | assert(triangle_indices); |
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256 | // box set |
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257 | aabb3f * paabb = trimesh->m_aabbset.m_boxes; |
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258 | GUINT triangle_count = gim_trimesh_get_triangle_count(trimesh); |
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259 | float * v1,*v2,*v3; |
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260 | GUINT i; |
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261 | for (i=0; i<triangle_count;i++) |
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262 | { |
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263 | v1 = &transformed_vertices[triangle_indices[0]][0]; |
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264 | v2 = &transformed_vertices[triangle_indices[1]][0]; |
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265 | v3 = &transformed_vertices[triangle_indices[2]][0]; |
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266 | COMPUTEAABB_FOR_TRIANGLE((*paabb),v1,v2,v3); |
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267 | triangle_indices+=3; |
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268 | paabb++; |
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269 | } |
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270 | //Clear planes cache |
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271 | GIM_BITSET_CLEAR_ALL(trimesh->m_planes_cache_bitset); |
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272 | //Sorts set |
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273 | gim_aabbset_update(&trimesh->m_aabbset); |
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274 | } |
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275 | |
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276 | //! Updates the trimesh if needed |
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277 | /*! |
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278 | \post If gim_trimesh_needs_update returns 1, then it calls gim_trimesh_update_vertices and gim_trimesh_update_aabbset |
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279 | */ |
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280 | void gim_trimesh_update(GIM_TRIMESH * trimesh) |
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281 | { |
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282 | if(gim_trimesh_needs_update(trimesh)==0) return; |
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283 | gim_trimesh_update_vertices(trimesh); |
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284 | gim_trimesh_locks_work_data(trimesh); |
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285 | gim_trimesh_update_aabbset(trimesh); |
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286 | gim_trimesh_unlocks_work_data(trimesh); |
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287 | |
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288 | //Clear update flag |
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289 | trimesh->m_mask &= ~GIM_TRIMESH_NEED_UPDATE; |
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290 | } |
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291 | |
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292 | void gim_trimesh_set_tranform(GIM_TRIMESH * trimesh, mat4f transform) |
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293 | { |
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294 | GREAL diff = 0.0f; |
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295 | float * originaltrans = &trimesh->m_transform[0][0]; |
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296 | float * newtrans = &transform[0][0]; |
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297 | GUINT i; |
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298 | for (i=0;i<16;i++) |
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299 | { |
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300 | diff += fabs(originaltrans[i]-newtrans[i]); |
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301 | } |
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302 | |
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303 | // if(IS_ZERO(diff)) return ;///don't need to update |
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304 | if(diff< 0.00001f) return ;///don't need to update |
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305 | |
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306 | COPY_MATRIX_4X4(trimesh->m_transform,transform); |
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307 | |
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308 | gim_trimesh_post_update(trimesh); |
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309 | } |
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310 | |
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311 | void gim_trimesh_get_triangle_data(GIM_TRIMESH * trimesh, GUINT triangle_index, GIM_TRIANGLE_DATA * tri_data) |
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312 | { |
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313 | vec3f * transformed_vertices = GIM_BUFFER_ARRAY_POINTER(vec3f,trimesh->m_transformed_vertex_buffer,0); |
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314 | |
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315 | GUINT * triangle_indices = GIM_BUFFER_ARRAY_POINTER(GUINT,trimesh->m_tri_index_buffer,triangle_index*3); |
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316 | |
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317 | |
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318 | //Copy the vertices |
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319 | VEC_COPY(tri_data->m_vertices[0],transformed_vertices[triangle_indices[0]]); |
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320 | VEC_COPY(tri_data->m_vertices[1],transformed_vertices[triangle_indices[1]]); |
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321 | VEC_COPY(tri_data->m_vertices[2],transformed_vertices[triangle_indices[2]]); |
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322 | |
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323 | //Get the planes |
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324 | GIM_TRIPLANES_CACHE * planes = GIM_DYNARRAY_POINTER(GIM_TRIPLANES_CACHE,trimesh->m_planes_cache_buffer); |
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325 | planes += triangle_index; |
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326 | |
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327 | //verify planes cache |
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328 | GUINT bit_eval; |
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329 | GIM_BITSET_GET(trimesh->m_planes_cache_bitset,triangle_index,bit_eval); |
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330 | if(bit_eval == 0)// Needs to calc the planes |
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331 | { |
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332 | //Calc the face plane |
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333 | TRIANGLE_PLANE(tri_data->m_vertices[0],tri_data->m_vertices[1],tri_data->m_vertices[2],planes->m_planes[0]); |
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334 | //Calc the edge 1 |
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335 | EDGE_PLANE(tri_data->m_vertices[0],tri_data->m_vertices[1],(planes->m_planes[0]),(planes->m_planes[1])); |
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336 | |
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337 | //Calc the edge 2 |
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338 | EDGE_PLANE(tri_data->m_vertices[1],tri_data->m_vertices[2],(planes->m_planes[0]),(planes->m_planes[2])); |
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339 | |
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340 | //Calc the edge 3 |
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341 | EDGE_PLANE(tri_data->m_vertices[2],tri_data->m_vertices[0],(planes->m_planes[0]), (planes->m_planes[3])); |
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342 | |
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343 | //mark |
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344 | GIM_BITSET_SET(trimesh->m_planes_cache_bitset,triangle_index); |
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345 | } |
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346 | |
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347 | |
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348 | VEC_COPY_4((tri_data->m_planes.m_planes[0]),(planes->m_planes[0]));//face plane |
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349 | VEC_COPY_4((tri_data->m_planes.m_planes[1]),(planes->m_planes[1]));//edge1 |
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350 | VEC_COPY_4((tri_data->m_planes.m_planes[2]),(planes->m_planes[2]));//edge2 |
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351 | VEC_COPY_4((tri_data->m_planes.m_planes[3]),(planes->m_planes[3]));//edge3 |
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352 | } |
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353 | |
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354 | void gim_trimesh_get_triangle_vertices(GIM_TRIMESH * trimesh, GUINT triangle_index, vec3f v1,vec3f v2,vec3f v3) |
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355 | { |
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356 | vec3f * transformed_vertices = GIM_BUFFER_ARRAY_POINTER(vec3f,trimesh->m_transformed_vertex_buffer,0); |
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357 | |
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358 | GUINT * triangle_indices = GIM_BUFFER_ARRAY_POINTER(GUINT,trimesh->m_tri_index_buffer,triangle_index*3); |
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359 | |
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360 | //Copy the vertices |
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361 | VEC_COPY(v1,transformed_vertices[triangle_indices[0]]); |
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362 | VEC_COPY(v2,transformed_vertices[triangle_indices[1]]); |
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363 | VEC_COPY(v3,transformed_vertices[triangle_indices[2]]); |
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364 | } |
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