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Diffstat (limited to 'progs/objviewer/glm.h')
| -rw-r--r-- | progs/objviewer/glm.h | 287 |
1 files changed, 0 insertions, 287 deletions
diff --git a/progs/objviewer/glm.h b/progs/objviewer/glm.h deleted file mode 100644 index 1a5646fa4c..0000000000 --- a/progs/objviewer/glm.h +++ /dev/null @@ -1,287 +0,0 @@ -/* - * GLM library. Wavefront .obj file format reader/writer/manipulator. - * - * Written by Nate Robins, 1997. - * email: ndr@pobox.com - * www: http://www.pobox.com/~ndr - */ - -#ifndef GLM_H -#define GLM_H - - -typedef unsigned int uint; - - -#ifndef M_PI -#define M_PI 3.14159265 -#endif - - -/* defines */ -#define GLM_NONE (0) /* render with only vertices */ -#define GLM_FLAT (1 << 0) /* render with facet normals */ -#define GLM_SMOOTH (1 << 1) /* render with vertex normals */ -#define GLM_TEXTURE (1 << 2) /* render with texture coords */ -#define GLM_COLOR (1 << 3) /* render with colors */ -#define GLM_MATERIAL (1 << 4) /* render with materials */ - - -/* structs */ - -/* GLMmaterial: Structure that defines a material in a model. - */ -typedef struct _GLMmaterial -{ - char* name; /* name of material */ - float diffuse[4]; /* diffuse component */ - float ambient[4]; /* ambient component */ - float specular[4]; /* specular component */ - float emmissive[4]; /* emmissive component */ - float shininess; /* specular exponent */ - char *map_kd; /* diffuse texture map file */ - uint texture_kd; /* diffuse texture map */ - uint texture_ks; /* specular texture map */ - int uDiffuse, uAmbient, uSpecular, uShininess, uDiffTex, uSpecTex; - uint prog; -} GLMmaterial; - -/* GLMtriangle: Structure that defines a triangle in a model. - */ -typedef struct { - uint vindices[3]; /* array of triangle vertex indices */ - uint nindices[3]; /* array of triangle normal indices */ - uint tindices[3]; /* array of triangle texcoord indices*/ - uint findex; /* index of triangle facet normal */ -} GLMtriangle; - -/* GLMgroup: Structure that defines a group in a model. - */ -typedef struct _GLMgroup { - char* name; /* name of this group */ - uint numtriangles; /* number of triangles in this group */ - uint* triangles; /* array of triangle indices */ - uint material; /* index to material for group */ - uint * triIndexes; - uint minIndex, maxIndex; - struct _GLMgroup* next; /* pointer to next group in model */ -} GLMgroup; - -/* GLMmodel: Structure that defines a model. - */ -typedef struct { - char* pathname; /* path to this model */ - char* mtllibname; /* name of the material library */ - - uint numvertices; /* number of vertices in model */ - float* vertices; /* array of vertices */ - - uint numnormals; /* number of normals in model */ - float* normals; /* array of normals */ - - uint numtexcoords; /* number of texcoords in model */ - float* texcoords; /* array of texture coordinates */ - - uint numfacetnorms; /* number of facetnorms in model */ - float* facetnorms; /* array of facetnorms */ - - uint numtriangles; /* number of triangles in model */ - GLMtriangle* triangles; /* array of triangles */ - - uint nummaterials; /* number of materials in model */ - GLMmaterial* materials; /* array of materials */ - - uint numgroups; /* number of groups in model */ - GLMgroup* groups; /* linked list of groups */ - - float position[3]; /* position of the model */ - float scale; - - uint vbo; /* OpenGL VBO for vertex data */ - uint vertexSize; /* number of floats per vertex */ - uint posOffset; /* offset of position within vertex, in bytes */ - uint normOffset; /* offset of normal within vertex, in bytes */ - uint texOffset; /* offset of texcoord within vertex, in bytes */ -} GLMmodel; - - -/* public functions */ - -/* glmUnitize: "unitize" a model by translating it to the origin and - * scaling it to fit in a unit cube around the origin. Returns the - * scalefactor used. - * - * model - properly initialized GLMmodel structure - */ -float -glmUnitize(GLMmodel* model); - -/* glmDimensions: Calculates the dimensions (width, height, depth) of - * a model. - * - * model - initialized GLMmodel structure - * dimensions - array of 3 floats (float dimensions[3]) - */ -void -glmDimensions(GLMmodel* model, float* dimensions); - -/* glmScale: Scales a model by a given amount. - * - * model - properly initialized GLMmodel structure - * scale - scalefactor (0.5 = half as large, 2.0 = twice as large) - */ -void -glmScale(GLMmodel* model, float scale); - -/* glmReverseWinding: Reverse the polygon winding for all polygons in - * this model. Default winding is counter-clockwise. Also changes - * the direction of the normals. - * - * model - properly initialized GLMmodel structure - */ -void -glmReverseWinding(GLMmodel* model); - -/* glmFacetNormals: Generates facet normals for a model (by taking the - * cross product of the two vectors derived from the sides of each - * triangle). Assumes a counter-clockwise winding. - * - * model - initialized GLMmodel structure - */ -void -glmFacetNormals(GLMmodel* model); - -/* glmVertexNormals: Generates smooth vertex normals for a model. - * First builds a list of all the triangles each vertex is in. Then - * loops through each vertex in the list averaging all the facet - * normals of the triangles each vertex is in. Finally, sets the - * normal index in the triangle for the vertex to the generated smooth - * normal. If the dot product of a facet normal and the facet normal - * associated with the first triangle in the list of triangles the - * current vertex is in is greater than the cosine of the angle - * parameter to the function, that facet normal is not added into the - * average normal calculation and the corresponding vertex is given - * the facet normal. This tends to preserve hard edges. The angle to - * use depends on the model, but 90 degrees is usually a good start. - * - * model - initialized GLMmodel structure - * angle - maximum angle (in degrees) to smooth across - */ -void -glmVertexNormals(GLMmodel* model, float angle); - -/* glmLinearTexture: Generates texture coordinates according to a - * linear projection of the texture map. It generates these by - * linearly mapping the vertices onto a square. - * - * model - pointer to initialized GLMmodel structure - */ -void -glmLinearTexture(GLMmodel* model); - -/* glmSpheremapTexture: Generates texture coordinates according to a - * spherical projection of the texture map. Sometimes referred to as - * spheremap, or reflection map texture coordinates. It generates - * these by using the normal to calculate where that vertex would map - * onto a sphere. Since it is impossible to map something flat - * perfectly onto something spherical, there is distortion at the - * poles. This particular implementation causes the poles along the X - * axis to be distorted. - * - * model - pointer to initialized GLMmodel structure - */ -void -glmSpheremapTexture(GLMmodel* model); - -/* glmDelete: Deletes a GLMmodel structure. - * - * model - initialized GLMmodel structure - */ -void -glmDelete(GLMmodel* model); - -/* glmReadOBJ: Reads a model description from a Wavefront .OBJ file. - * Returns a pointer to the created object which should be free'd with - * glmDelete(). - * - * filename - name of the file containing the Wavefront .OBJ format data. - */ -GLMmodel* -glmReadOBJ(char* filename); - -/* glmWriteOBJ: Writes a model description in Wavefront .OBJ format to - * a file. - * - * model - initialized GLMmodel structure - * filename - name of the file to write the Wavefront .OBJ format data to - * mode - a bitwise or of values describing what is written to the file - * GLM_NONE - write only vertices - * GLM_FLAT - write facet normals - * GLM_SMOOTH - write vertex normals - * GLM_TEXTURE - write texture coords - * GLM_FLAT and GLM_SMOOTH should not both be specified. - */ -void -glmWriteOBJ(GLMmodel* model, char* filename, uint mode); - -/* glmDraw: Renders the model to the current OpenGL context using the - * mode specified. - * - * model - initialized GLMmodel structure - * mode - a bitwise OR of values describing what is to be rendered. - * GLM_NONE - render with only vertices - * GLM_FLAT - render with facet normals - * GLM_SMOOTH - render with vertex normals - * GLM_TEXTURE - render with texture coords - * GLM_FLAT and GLM_SMOOTH should not both be specified. - */ -void -glmDraw(GLMmodel* model, uint mode); - -/* glmList: Generates and returns a display list for the model using - * the mode specified. - * - * model - initialized GLMmodel structure - * mode - a bitwise OR of values describing what is to be rendered. - * GLM_NONE - render with only vertices - * GLM_FLAT - render with facet normals - * GLM_SMOOTH - render with vertex normals - * GLM_TEXTURE - render with texture coords - * GLM_FLAT and GLM_SMOOTH should not both be specified. - */ -uint -glmList(GLMmodel* model, uint mode); - -/* glmWeld: eliminate (weld) vectors that are within an epsilon of - * each other. - * - * model - initialized GLMmodel structure - * epsilon - maximum difference between vertices - * ( 0.00001 is a good start for a unitized model) - * - */ -void -glmWeld(GLMmodel* model, float epsilon); - -void -glmReIndex(GLMmodel *model); - -void -glmMakeVBOs(GLMmodel *model); - -void -glmDrawVBO(GLMmodel *model); - -void -glmPrint(const GLMmodel *model); - -void -glmShaderMaterial(GLMmaterial *mat); - -void -glmLoadTextures(GLMmodel *model); - -void -glmSpecularTexture(GLMmodel *model, uint cubeTex); - -#endif /* GLM_H */ |