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2 | |
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3 | /* |
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4 | orxonox - the future of 3D-vertical-scrollers |
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5 | |
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6 | Copyright (C) 2004 orx |
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7 | |
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8 | This program is free software; you can redistribute it and/or modify |
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9 | it under the terms of the GNU General Public License as published by |
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10 | the Free Software Foundation; either version 2, or (at your option) |
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11 | any later version. |
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12 | |
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13 | ### File Specific: |
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14 | main-programmer: Christian Meyer |
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15 | co-programmer: ... |
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16 | */ |
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17 | |
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18 | #include "camera.h" |
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19 | |
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20 | #include "world.h" |
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21 | #include "world_entity.h" |
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22 | #include "vector.h" |
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23 | |
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24 | using namespace std; |
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25 | |
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26 | //////////// |
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27 | // CAMERA // |
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28 | //////////// |
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29 | |
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30 | /** |
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31 | \brief creates a Camera |
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32 | */ |
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33 | Camera::Camera(void) |
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34 | { |
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35 | this->target = new CameraTarget(); |
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36 | |
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37 | this->setFovy(60); |
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38 | this->setAspectRatio(1.2f); |
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39 | this->setClipRegion(.1, 2000); |
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40 | } |
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41 | |
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42 | /** |
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43 | \brief default destructor |
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44 | */ |
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45 | Camera::~Camera(void) |
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46 | { |
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47 | |
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48 | } |
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49 | |
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50 | /** |
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51 | \brief focuses the Camera onto a Target |
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52 | \param target the new PNode the Camera should look at. |
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53 | */ |
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54 | void Camera::lookAt(PNode* target) |
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55 | { |
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56 | this->target->setParent(target); |
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57 | } |
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58 | |
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59 | /** |
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60 | \returns The PNode of the Target (from there you can get position and so on |
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61 | */ |
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62 | PNode* Camera::getTarget(void) |
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63 | { |
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64 | return (PNode*)this->target; |
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65 | } |
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66 | |
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67 | |
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68 | /** |
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69 | \brief sets a new AspectRatio |
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70 | \param aspectRatio the new aspect ratio to set (width / height) |
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71 | */ |
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72 | void Camera::setAspectRatio(float aspectRatio) |
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73 | { |
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74 | this->aspectRatio = aspectRatio; |
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75 | } |
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76 | |
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77 | /** |
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78 | \brief sets the Field of View to fofy |
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79 | \param fovy new field of view factor (in degrees) |
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80 | */ |
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81 | void Camera::setFovy(float fovy) |
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82 | { |
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83 | this->fovy = fovy; |
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84 | } |
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85 | |
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86 | /** |
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87 | \brief Sets a new clipping region |
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88 | \param nearClip The near clip plane |
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89 | \param farClip The far clip plane |
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90 | */ |
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91 | void Camera::setClipRegion(float nearClip, float farClip) |
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92 | { |
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93 | this->nearClip = nearClip; |
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94 | this->farClip = farClip; |
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95 | } |
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96 | |
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97 | /** |
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98 | \brief initialize rendering perspective according to this camera |
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99 | |
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100 | This is called immediately before the rendering cycle starts, it sets all global |
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101 | rendering options as well as the GL_PROJECTION matrix according to the camera. |
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102 | */ |
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103 | void Camera::apply () |
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104 | { |
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105 | // switching to Projection Matrix |
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106 | glMatrixMode (GL_PROJECTION); |
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107 | glLoadIdentity (); |
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108 | |
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109 | // setting up the perspective |
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110 | gluPerspective(this->fovy, |
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111 | this->aspectRatio, |
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112 | this->nearClip, |
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113 | this->farClip); |
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114 | |
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115 | // speed-up feature |
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116 | Vector cameraPosition = this->getAbsCoor(); |
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117 | Vector targetPosition = this->target->getAbsCoor(); |
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118 | Vector up = Vector(0, 1, 0); |
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119 | up = this->getAbsDir().apply(up); |
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120 | |
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121 | // Setting the Camera Eye, lookAt and up Vectors |
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122 | gluLookAt(cameraPosition.x, cameraPosition.y, cameraPosition.z, |
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123 | targetPosition.x, targetPosition.y, targetPosition.z, |
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124 | up.x, up.y, up.z); |
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125 | |
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126 | // switching back to Modeling Matrix |
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127 | glMatrixMode (GL_MODELVIEW); |
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128 | } |
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129 | |
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130 | |
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131 | |
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132 | /////////////////// |
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133 | // CAMERA-TARGET // |
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134 | /////////////////// |
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135 | |
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136 | |
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137 | CameraTarget::CameraTarget() |
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138 | { |
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139 | this->setMode(PNODE_MOVEMENT); |
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140 | } |
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141 | |
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142 | CameraTarget::~CameraTarget() |
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143 | { |
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144 | |
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145 | } |
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