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1 #ifndef GOAT3D_H_
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2 #define GOAT3D_H_
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3
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4 #include <stdio.h>
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5 #include <stdlib.h>
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6
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7 #define GOAT3D_MAT_ATTR_DIFFUSE "diffuse"
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8 #define GOAT3D_MAT_ATTR_SPECULAR "specular"
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9 #define GOAT3D_MAT_ATTR_SHININESS "shininess"
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10 #define GOAT3D_MAT_ATTR_NORMAL "normal"
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11 #define GOAT3D_MAT_ATTR_BUMP "bump"
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12 #define GOAT3D_MAT_ATTR_REFLECTION "reflection"
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13 #define GOAT3D_MAT_ATTR_TRANSMISSION "transmission"
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14 #define GOAT3D_MAT_ATTR_IOR "ior"
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15
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16 enum goat3d_mesh_attrib {
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17 GOAT3D_MESH_ATTR_VERTEX,
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18 GOAT3D_MESH_ATTR_NORMAL,
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19 GOAT3D_MESH_ATTR_TANGENT,
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20 GOAT3D_MESH_ATTR_TEXCOORD,
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21 GOAT3D_MESH_ATTR_SKIN_WEIGHT,
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22 GOAT3D_MESH_ATTR_SKIN_MATRIX,
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23 GOAT3D_MESH_ATTR_COLOR,
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24
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25 NUM_GOAT3D_MESH_ATTRIBS
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26 };
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27
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28 enum goat3d_node_type {
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29 GOAT3D_NODE_NULL,
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30 GOAT3D_NODE_MESH,
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31 GOAT3D_NODE_LIGHT,
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32 GOAT3D_NODE_CAMERA
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33 };
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34
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35 /* immediate mode mesh construction primitive type */
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36 enum goat3d_im_primitive {
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37 GOAT3D_TRIANGLES,
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38 GOAT3D_QUADS
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39 };
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40
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41
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42 enum goat3d_option {
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43 GOAT3D_OPT_SAVEXML, /* save in XML format */
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44
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45 NUM_GOAT3D_OPTIONS
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46 };
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47
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48 struct goat3d;
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49 struct goat3d_material;
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50 struct goat3d_mesh;
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51 struct goat3d_light;
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52 struct goat3d_camera;
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53 struct goat3d_node;
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54
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55 struct goat3d_io {
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56 void *cls; /* closure data */
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57
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58 long (*read)(void *buf, size_t bytes, void *uptr);
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59 long (*write)(const void *buf, size_t bytes, void *uptr);
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60 long (*seek)(long offs, int whence, void *uptr);
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61 };
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62
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63 #ifdef __cplusplus
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64 extern "C" {
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65 #endif
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66
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67 /* construction/destruction */
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68 struct goat3d *goat3d_create(void);
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69 void goat3d_free(struct goat3d *g);
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70
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71 void goat3d_setopt(struct goat3d *g, enum goat3d_option opt, int val);
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72 int goat3d_getopt(const struct goat3d *g, enum goat3d_option opt);
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73
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74 /* load/save */
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75 int goat3d_load(struct goat3d *g, const char *fname);
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76 int goat3d_save(const struct goat3d *g, const char *fname);
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77
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78 int goat3d_load_file(struct goat3d *g, FILE *fp);
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79 int goat3d_save_file(const struct goat3d *g, FILE *fp);
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80
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81 int goat3d_load_io(struct goat3d *g, struct goat3d_io *io);
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82 int goat3d_save_io(const struct goat3d *g, struct goat3d_io *io);
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83
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84 /* misc scene properties */
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85 int goat3d_set_name(struct goat3d *g, const char *name);
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86 const char *goat3d_get_name(const struct goat3d *g);
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87
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88 void goat3d_set_ambient(struct goat3d *g, const float *ambient);
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89 void goat3d_set_ambient3f(struct goat3d *g, float ar, float ag, float ab);
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90 const float *goat3d_get_ambient(const struct goat3d *g);
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91
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92 /* materials */
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93 void goat3d_add_mtl(struct goat3d *g, struct goat3d_material *mtl);
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94
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95 struct goat3d_material *goat3d_create_mtl(void);
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96 void goat3d_destroy_mtl(struct goat3d_material *mtl);
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97
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98 void goat3d_set_mtl_name(struct goat3d_material *mtl, const char *name);
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99 const char *goat3d_get_mtl_name(const struct goat3d_material *mtl);
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100
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101 void goat3d_set_mtl_attrib(struct goat3d_material *mtl, const char *attrib, const float *val);
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102 void goat3d_set_mtl_attrib1f(struct goat3d_material *mtl, const char *attrib, float val);
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103 void goat3d_set_mtl_attrib3f(struct goat3d_material *mtl, const char *attrib, float r, float g, float b);
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104 void goat3d_set_mtl_attrib4f(struct goat3d_material *mtl, const char *attrib, float r, float g, float b, float a);
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105 const float *goat3d_get_mtl_attrib(struct goat3d_material *mtl, const char *attrib);
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106
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107 void goat3d_set_mtl_attrib_map(struct goat3d_material *mtl, const char *attrib, const char *mapname);
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108 const char *goat3d_get_mtl_attrib_map(struct goat3d_material *mtl, const char *attrib);
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109
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110 /* meshes */
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111 void goat3d_add_mesh(struct goat3d *g, struct goat3d_mesh *mesh);
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112 int goat3d_get_mesh_count(struct goat3d *g);
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113 struct goat3d_mesh *goat3d_get_mesh(struct goat3d *g, int idx);
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114 struct goat3d_mesh *goat3d_get_mesh_by_name(struct goat3d *g, const char *name);
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115
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116 struct goat3d_mesh *goat3d_create_mesh(void);
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117 void goat3d_destroy_mesh(struct goat3d_mesh *mesh);
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118
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119 void goat3d_set_mesh_name(struct goat3d_mesh *mesh, const char *name);
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120 const char *goat3d_get_mesh_name(const struct goat3d_mesh *mesh);
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121
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122 void goat3d_set_mesh_mtl(struct goat3d_mesh *mesh, struct goat3d_material *mtl);
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123 struct goat3d_material *goat3d_get_mesh_mtl(struct goat3d_mesh *mesh);
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124
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125 int goat3d_get_mesh_attrib_count(struct goat3d_mesh *mesh, enum goat3d_mesh_attrib attrib);
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126 int goat3d_get_mesh_face_count(struct goat3d_mesh *mesh);
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127
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128 /* sets all the data for a single vertex attribute array in one go.
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129 * vnum is the number of *vertices* to be set, not the number of floats, ints or whatever
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130 * data is expected to be something different depending on the attribute:
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131 * - GOAT3D_MESH_ATTR_VERTEX - 3 floats per vertex
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132 * - GOAT3D_MESH_ATTR_NORMAL - 3 floats per vertex
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133 * - GOAT3D_MESH_ATTR_TANGENT - 3 floats per vertex
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134 * - GOAT3D_MESH_ATTR_TEXCOORD - 2 floats per vertex
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135 * - GOAT3D_MESH_ATTR_SKIN_WEIGHT - 4 floats per vertex
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136 * - GOAT3D_MESH_ATTR_SKIN_MATRIX - 4 ints per vertex
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137 * - GOAT3D_MESH_ATTR_COLOR - 4 floats per vertex
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138 */
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139 void goat3d_set_mesh_attribs(struct goat3d_mesh *mesh, enum goat3d_mesh_attrib attrib, const void *data, int vnum);
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140 /* returns a pointer to the beginning of the requested mesh attribute array */
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141 void *goat3d_get_mesh_attribs(struct goat3d_mesh *mesh, enum goat3d_mesh_attrib attrib);
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142 /* returns a pointer to the requested mesh attribute */
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143 void *goat3d_get_mesh_attrib(struct goat3d_mesh *mesh, enum goat3d_mesh_attrib attrib, int idx);
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144
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145 /* sets all the faces in one go. data is an array of 3 int vertex indices per face */
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146 void goat3d_set_mesh_faces(struct goat3d_mesh *mesh, const int *data, int fnum);
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147 /* returns a pointer to the beginning of the face index array */
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148 int *goat3d_get_mesh_faces(struct goat3d_mesh *mesh);
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149 /* returns a pointer to a face index */
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150 int *goat3d_get_mesh_face(struct goat3d_mesh *mesh, int idx);
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151
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152 /* immediate mode OpenGL-like interface for setting mesh data
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153 * NOTE: using this interface will result in no vertex sharing between faces
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154 * NOTE2: the immedate mode interface is not thread-safe, either use locks, or don't
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155 * use it at all in multithreaded situations.
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156 */
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157 void goat3d_begin(struct goat3d_mesh *mesh, enum goat3d_im_primitive prim);
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158 void goat3d_end(void);
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159 void goat3d_vertex3f(float x, float y, float z);
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160 void goat3d_normal3f(float x, float y, float z);
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161 void goat3d_tangent3f(float x, float y, float z);
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162 void goat3d_texcoord2f(float x, float y);
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163 void goat3d_skin_weight4f(float x, float y, float z, float w);
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164 void goat3d_skin_matrix4i(int x, int y, int z, int w);
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165 void goat3d_color3f(float x, float y, float z);
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166 void goat3d_color4f(float x, float y, float z, float w);
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167
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168 /* lights */
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169 void goat3d_add_light(struct goat3d *g, struct goat3d_light *lt);
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170 int goat3d_get_light_count(struct goat3d *g);
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171 struct goat3d_light *goat3d_get_light(struct goat3d *g, int idx);
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172 struct goat3d_light *goat3d_get_light_by_name(struct goat3d *g, const char *name);
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173
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174 struct goat3d_light *goat3d_create_light(void);
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175 void goat3d_destroy_light(struct goat3d_light *lt);
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176
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177 /* cameras */
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178 void goat3d_add_camera(struct goat3d *g, struct goat3d_camera *cam);
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179 int goat3d_get_camera_count(struct goat3d *g);
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180 struct goat3d_camera *goat3d_get_camera(struct goat3d *g, int idx);
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181 struct goat3d_camera *goat3d_get_camera_by_name(struct goat3d *g, const char *name);
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182
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183 struct goat3d_camera *goat3d_create_camera(void);
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184 void goat3d_destroy_camera(struct goat3d_camera *cam);
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185
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186 /* nodes */
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187 void goat3d_add_node(struct goat3d *g, struct goat3d_node *node);
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188 int goat3d_get_node_count(struct goat3d *g);
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189 struct goat3d_node *goat3d_get_node(struct goat3d *g, int idx);
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190 struct goat3d_node *goat3d_get_node_by_name(struct goat3d *g, const char *name);
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191
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192 struct goat3d_node *goat3d_create_node(void);
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193 void goat3d_destroy_node(struct goat3d_node *node);
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194
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195 void goat3d_set_node_name(struct goat3d_node *node, const char *name);
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196 const char *goat3d_get_node_name(const struct goat3d_node *node);
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197
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198 void goat3d_set_node_object(struct goat3d_node *node, enum goat3d_node_type type, void *obj);
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199 void *goat3d_get_node_object(const struct goat3d_node *node);
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200 enum goat3d_node_type goat3d_get_node_type(const struct goat3d_node *node);
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201
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202 void goat3d_add_node_child(struct goat3d_node *node, struct goat3d_node *child);
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203 int goat3d_get_node_child_count(const struct goat3d_node *node);
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204 struct goat3d_node *goat3d_get_node_child(const struct goat3d_node *node, int idx);
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205
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206 void goat3d_set_node_position(struct goat3d_node *node, float x, float y, float z, long tmsec);
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207 void goat3d_set_node_rotation(struct goat3d_node *node, float qx, float qy, float qz, float qw, long tmsec);
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208 void goat3d_set_node_scaling(struct goat3d_node *node, float sx, float sy, float sz, long tmsec);
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209 void goat3d_set_node_pivot(struct goat3d_node *node, float px, float py, float pz);
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210
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211 void goat3d_get_node_position(const struct goat3d_node *node, float *xptr, float *yptr, float *zptr, long tmsec);
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212 void goat3d_get_node_rotation(const struct goat3d_node *node, float *xptr, float *yptr, float *zptr, float *wptr, long tmsec);
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213 void goat3d_get_node_scaling(const struct goat3d_node *node, float *xptr, float *yptr, float *zptr, long tmsec);
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214 void goat3d_get_node_pivot(const struct goat3d_node *node, float *xptr, float *yptr, float *zptr);
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215
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216 void goat3d_get_node_matrix(const struct goat3d_node *node, float *matrix, long tmsec);
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217
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218 #ifdef __cplusplus
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219 }
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220 #endif
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221
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222 #endif /* GOAT3D_H_ */
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