void vbo_exec_do_EvalCoord2f( struct vbo_exec_context *exec,
GLfloat u, GLfloat v )
{
GLuint attr;
for (attr = 1; attr <= VBO_ATTRIB_TEX7; attr++) {
struct gl_2d_map *map = exec->eval.map2[attr].map;
if (map) {
GLfloat uu = (u - map->u1) * map->du;
GLfloat vv = (v - map->v1) * map->dv;
GLfloat data[4];
ASSIGN_4V(data, 0, 0, 0, 1);
_math_horner_bezier_surf(map->Points,
data,
uu, vv,
exec->eval.map2[attr].sz,
map->Uorder, map->Vorder);
COPY_SZ_4V( exec->vtx.attrptr[attr],
exec->vtx.attrsz[attr],
data );
}
}
/** Vertex -- EvalCoord2f is a noop if this map not enabled:
**/
if (exec->eval.map2[0].map) {
struct gl_2d_map *map = exec->eval.map2[0].map;
GLfloat uu = (u - map->u1) * map->du;
GLfloat vv = (v - map->v1) * map->dv;
GLfloat vertex[4];
ASSIGN_4V(vertex, 0, 0, 0, 1);
if (exec->ctx->Eval.AutoNormal) {
GLfloat normal[4];
GLfloat du[4], dv[4];
_math_de_casteljau_surf(map->Points, vertex, du, dv, uu, vv,
exec->eval.map2[0].sz,
map->Uorder, map->Vorder);
if (exec->eval.map2[0].sz == 4) {
du[0] = du[0]*vertex[3] - du[3]*vertex[0];
du[1] = du[1]*vertex[3] - du[3]*vertex[1];
du[2] = du[2]*vertex[3] - du[3]*vertex[2];
dv[0] = dv[0]*vertex[3] - dv[3]*vertex[0];
dv[1] = dv[1]*vertex[3] - dv[3]*vertex[1];
dv[2] = dv[2]*vertex[3] - dv[3]*vertex[2];
}
CROSS3(normal, du, dv);
NORMALIZE_3FV(normal);
normal[3] = 1.0;
COPY_SZ_4V( exec->vtx.attrptr[VBO_ATTRIB_NORMAL],
exec->vtx.attrsz[VBO_ATTRIB_NORMAL],
normal );
}
else {
_math_horner_bezier_surf(map->Points, vertex, uu, vv,
exec->eval.map2[0].sz,
map->Uorder, map->Vorder);
}
if (exec->vtx.attrsz[0] == 4)
CALL_Vertex4fv(GET_DISPATCH(), ( vertex ));
else
CALL_Vertex3fv(GET_DISPATCH(), ( vertex ));
}
}
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 );
}
}
}
