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Diffstat (limited to 'opengl/include/pdp_mesh.h')
| -rw-r--r-- | opengl/include/pdp_mesh.h | 210 |
1 files changed, 0 insertions, 210 deletions
diff --git a/opengl/include/pdp_mesh.h b/opengl/include/pdp_mesh.h deleted file mode 100644 index 8fd6dff..0000000 --- a/opengl/include/pdp_mesh.h +++ /dev/null @@ -1,210 +0,0 @@ -/* - * Pure Data Packet module. mesh object specification - * Copyright (c) by Tom Schouten <pdp@zzz.kotnet.org> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - * - */ - -/* a very naive approach to triangular meshes */ - -#ifndef PDP_MESH_H -#define PDP_MESH_H -#include "pdp_list.h" - - -/* VERTEX type - a vertex has a coordinate and normal vector - a list of triangles it is connected to - and a list of vertexes it is connected to (these count as links) */ - -typedef struct _vertex -{ - float c[3]; // coordinates - float n[3]; // normal (or force vector) - t_pdp_list *trilist; - t_pdp_list *vertlist; -} t_vertex; - - -/* TRIANGLE type: - a triangle consist of - - 3 vertices - - 3 optional median vertices (subdivision intermediates) */ -typedef struct _triangle -{ - t_vertex *v[3]; // vertices - t_vertex *m[3]; // median vertices - float n[3]; //triangle normal -} t_triangle; - - -/* MESH type: - a mesh is a list of vertices - and a list of triangles (connections) */ -typedef struct _mesh -{ - t_pdp_list *triangles; - t_pdp_list *vertices; - int normal_type; - int refine_type; -} t_mesh; - - - -/* object configuratie */ -#define MESH_NORMAL_SPHERE 1 // normal = origin -> vertex -#define MESH_NORMAL_PRISM 2 // normal = center of gravity of prism base -> vertex -#define MESH_NORMAL_RANDOM 3 // normal = random vector -#define MESH_NORMAL_AVERAGE 4 // normal = average of surrounding triangles - -/* refinement method */ -#define MESH_REFINE_THREE 1 // triangle -> 3 triangles connecting center of gravity -#define MESH_REFINE_FOUR 2 // triangle -> 4 triangles connecting link medians - -// vector utility stuff - -// fixed size iterators for the lazy -#define I3(i) for(i=0; i<3; i++) -#define I4(i) for(i=0; i<4; i++) - -static inline float _vector3_dot(float *v0, float *v1) -{ - float d; - d = v0[0] * v1[0]; - d += v0[1] * v1[1]; - d += v0[2] * v1[2]; - return d; -} - -static inline void _vector3_scale(float *v, float s) -{ - int k; - I3(k) v[k] *= s; -} - -static inline float _vector3_normalize(float *v) -{ - float length = 0; - float scale = 0; - int k; - length = sqrt(_vector3_dot(v,v)); - scale = 1.0f / length; - _vector3_scale(v, scale); - return length; -} - -static inline void _vector3_cross(float *a, float *b, float *r) -{ - r[0] = a[1]*b[2] - a[2]*b[1]; - r[1] = a[2]*b[0] - a[0]*b[2]; - r[2] = a[0]*b[1] - a[1]*b[0]; -} - -static inline float _rand(void) -{ - long int r = random(); - float f; - r -= (RAND_MAX >> 1); - f = (float)r; - f *= (2.0f / (float)RAND_MAX); - return f; -} - - - - -/* VERTEX methods */ -void vertex_add_triangle(t_vertex *v, t_triangle *t); -void vertex_remove_triangle(t_vertex *v, t_triangle *t); -void vertex_add_neighbour(t_vertex *v, t_vertex *neighbour); - - -/* constructor/destructors are "private" - they may only be called by the mesh object to ensure - the vector list stays sound (i.e. without duplicates) */ -void _vertex_free(t_vertex *v); -t_vertex *_vertex_new(float *c, float *n); - - -void vertex_compute_normal_random(t_vertex *v); -void vertex_compute_normal_sphere(t_vertex *v); -void vertex_compute_normal_prism(t_vertex *v); -float vertex_normalize(t_vertex *v); - - -/* TRIANGLE methods */ - -/* create triangle (a connection between 3 vertices): - counterclockwize with facing front - this method is "private" - you can only create triangles as part of a mesh */ -t_triangle *_triangle_new(t_vertex *v0, t_vertex *v1, t_vertex *v2); - -/* delete a triangle, disconnecting the vertices */ -void _triangle_free(t_triangle *t); - -/* get triangle that shares the link between v0 and v1 */ -t_triangle *triangle_neighbour(t_triangle *t, t_vertex *v0, t_vertex *v1); - -/* add a median vector to a link in a triangle - note: vertices must be in triangle, or behaviour is undefined */ -void triangle_add_median(t_triangle *t, t_vertex *v0, t_vertex *v1, t_vertex *median); - -/* MESH methods */ - -/* add and remove methods for vertices and triangles */ -t_vertex *mesh_vertex_add(t_mesh *m, float *c, float *n); -void mesh_vertex_remove(t_mesh *m, t_vertex *v); -t_triangle *mesh_triangle_add(t_mesh *m, t_vertex *v0, t_vertex *v1, t_vertex *v2); -void mesh_triangle_remove(t_mesh *m, t_triangle *t); - -/* calculate normals */ -void mesh_calculate_normals(t_mesh *m); - -/* split a triangle in 4, using the intermedia median vertex storage */ -void mesh_split_four(t_mesh *m, t_triangle *old_t); - -/* split a triangle in 3 */ -void mesh_split_three(t_mesh *m, t_triangle *old_t); - -void mesh_split_all_four(t_mesh *m); - -void mesh_split_all_three(t_mesh *m); - -void mesh_split_random_three(t_mesh *m); - -void mesh_free(t_mesh *m); - -t_mesh *_mesh_new(void); - -/* new tetra */ -t_mesh *mesh_new_tetra(void); - - - -void _mesh_relax_compute_resultant_spring(t_mesh *m, float *center, float d0, float r0); -void _mesh_relax_apply_force(t_mesh *m, float k); -void mesh_compute_center(t_mesh *m, float *c); -void mesh_translate(t_mesh *m, float *c); - -/* relax a mesh (move toward equal link length) */ -void mesh_relax(t_mesh *m, float step, float d0, float r0); - -/* print some debug information */ -void mesh_debug(t_mesh *m); - - -#endif |