t_camera *create_camera(t_vector position)
{
t_camera *camera;
camera = (t_camera *)malloc(sizeof(t_camera));
camera->campos = position;
camera->camdir = normalize(NEG(SUB(camera->campos, D_VEC)));
camera->camright = normalize(CROSS_PROD(Y_VEC, camera->camdir));
camera->camdown = CROSS_PROD(camera->camright, camera->camdir);
return (camera);
}
static void do_EvalCoord2f( GLcontext* ctx, GLfloat u, GLfloat v )
{
/** Color Index **/
if (ctx->Eval.Map2Index) {
GLfloat findex;
struct gl_2d_map *map = &ctx->EvalMap.Map2Index;
GLfloat uu = (u - map->u1) * map->du;
GLfloat vv = (v - map->v1) * map->dv;
_math_horner_bezier_surf(map->Points, &findex, uu, vv, 1,
map->Uorder, map->Vorder);
glIndexi( (GLuint) (GLint) findex );
}
/** Color **/
if (ctx->Eval.Map2Color4) {
GLfloat fcolor[4];
struct gl_2d_map *map = &ctx->EvalMap.Map2Color4;
GLfloat uu = (u - map->u1) * map->du;
GLfloat vv = (v - map->v1) * map->dv;
_math_horner_bezier_surf(map->Points, fcolor, uu, vv, 4,
map->Uorder, map->Vorder);
glColor4fv( fcolor );
}
/** Normal **/
if (ctx->Eval.Map2Normal &&
(!ctx->Eval.AutoNormal || (!ctx->Eval.Map2Vertex3 &&
!ctx->Eval.Map2Vertex4))) {
GLfloat normal[3];
struct gl_2d_map *map = &ctx->EvalMap.Map2Normal;
GLfloat uu = (u - map->u1) * map->du;
GLfloat vv = (v - map->v1) * map->dv;
_math_horner_bezier_surf(map->Points, normal, uu, vv, 3,
map->Uorder, map->Vorder);
glNormal3fv( normal );
}
/** Texture Coordinates **/
if (ctx->Eval.Map2TextureCoord4) {
GLfloat texcoord[4];
struct gl_2d_map *map = &ctx->EvalMap.Map2Texture4;
GLfloat uu = (u - map->u1) * map->du;
GLfloat vv = (v - map->v1) * map->dv;
_math_horner_bezier_surf(map->Points, texcoord, uu, vv, 4,
map->Uorder, map->Vorder);
glTexCoord4fv( texcoord );
}
else if (ctx->Eval.Map2TextureCoord3) {
GLfloat texcoord[4];
struct gl_2d_map *map = &ctx->EvalMap.Map2Texture3;
GLfloat uu = (u - map->u1) * map->du;
GLfloat vv = (v - map->v1) * map->dv;
_math_horner_bezier_surf(map->Points, texcoord, uu, vv, 3,
map->Uorder, map->Vorder);
glTexCoord3fv( texcoord );
}
else if (ctx->Eval.Map2TextureCoord2) {
GLfloat texcoord[4];
struct gl_2d_map *map = &ctx->EvalMap.Map2Texture2;
GLfloat uu = (u - map->u1) * map->du;
GLfloat vv = (v - map->v1) * map->dv;
_math_horner_bezier_surf(map->Points, texcoord, uu, vv, 2,
map->Uorder, map->Vorder);
glTexCoord2fv( texcoord );
}
else if (ctx->Eval.Map2TextureCoord1) {
GLfloat texcoord[4];
struct gl_2d_map *map = &ctx->EvalMap.Map2Texture1;
GLfloat uu = (u - map->u1) * map->du;
GLfloat vv = (v - map->v1) * map->dv;
_math_horner_bezier_surf(map->Points, texcoord, uu, vv, 1,
map->Uorder, map->Vorder);
glTexCoord1fv( texcoord );
}
/** Vertex **/
if(ctx->Eval.Map2Vertex4) {
GLfloat vertex[4];
GLfloat normal[3];
struct gl_2d_map *map = &ctx->EvalMap.Map2Vertex4;
GLfloat uu = (u - map->u1) * map->du;
GLfloat vv = (v - map->v1) * map->dv;
if (ctx->Eval.AutoNormal) {
GLfloat du[4], dv[4];
_math_de_casteljau_surf(map->Points, vertex, du, dv, uu, vv, 4,
map->Uorder, map->Vorder);
CROSS_PROD(normal, du, dv);
NORMALIZE_3FV(normal);
glNormal3fv( normal );
glVertex4fv( vertex );
}
else {
_math_horner_bezier_surf(map->Points, vertex, uu, vv, 4,
map->Uorder, map->Vorder);
glVertex4fv( vertex );
}
}
else if (ctx->Eval.Map2Vertex3) {
GLfloat vertex[4];
struct gl_2d_map *map = &ctx->EvalMap.Map2Vertex3;
GLfloat uu = (u - map->u1) * map->du;
GLfloat vv = (v - map->v1) * map->dv;
if (ctx->Eval.AutoNormal) {
GLfloat du[3], dv[3];
GLfloat normal[3];
_math_de_casteljau_surf(map->Points, vertex, du, dv, uu, vv, 3,
map->Uorder, map->Vorder);
CROSS_PROD(normal, du, dv);
NORMALIZE_3FV(normal);
glNormal3fv( normal );
glVertex3fv( vertex );
}
else {
_math_horner_bezier_surf(map->Points, vertex, uu, vv, 3,
map->Uorder, map->Vorder);
glVertex3fv( vertex );
}
}
}
