/******************************************************************************
* vertex transform
*/
static void
tnl_vertex_transform (void)
{
const GLfloat *mvp = get_mvp();
/* clip coords: the data pointer _CAN_ be indexed! */
if (tnl_extra_flags & TNL_VERTEXW_BIT) {
matrix_mul_vec4_batch(tnl_vb.clip, mvp, (const GLfloat4 *)tnl_vb.attr[TNL_VERTEX].data, tnl_vb.len);
} else {
matrix_mul_vec3_batch(tnl_vb.clip, mvp, (const GLfloat4 *)tnl_vb.attr[TNL_VERTEX].data, tnl_vb.len);
}
if (tnl_render_state & D_NEED_VEYE) {
const GLfloat *mv = ctx_mx_modelview_top->mat;
if (tnl_render_state & D_NEED_VEYN) {
tnl_veyn_func[(tnl_extra_flags & TNL_VERTEXW_BIT) ? 1 : 0](mv);
} else {
if (tnl_extra_flags & TNL_VERTEXW_BIT) {
matrix_mul_vec4_batch(tnl_vb.veye, mv, (const GLfloat4 *)tnl_vb.attr[TNL_VERTEX].data, tnl_vb.len);
} else {
matrix_mul_vec3_batch(tnl_vb.veye, mv, (const GLfloat4 *)tnl_vb.attr[TNL_VERTEX].data, tnl_vb.len);
}
}
}
if (tnl_render_state & D_NEED_NEYE) {
tnl_calc_neye_tab[ctx_normalize]();
}
if (ctx_hint_clip_volume == GL_FASTEST) {
tnl_clipmask_tab[V_NOCLIP]();
} else if (ctx_userclip) {
tnl_clipmask_tab[V_USERCLIP]();
} else {
tnl_clipmask_tab[0]();
}
}
void SpriteRender::render_rectangle(fmat4* transform, float width, float height, fvec3 texture_corners[4]) {
fmat4 view;
get_mvp(&view);
view = *transform * view;
// add to the transformation matrix a scaling factor for the radius
view = glm::scale(view, fvec3(0, height, width));
OGLAttr::current_shader->set_transform_matrix(&view);
int num_triangles = 6;
GLfloat rectangle_vertex_data[6][3] = {
{0, -1, -1},
{0, -1, 1},
{0, 1, -1},
{0, 1, -1},
{0, -1, 1},
{0, 1, 1},
};
fvec3 texture_binds[6];
texture_binds[0] = texture_corners[0];
texture_binds[1] = texture_corners[1];
texture_binds[2] = texture_corners[2];
texture_binds[3] = texture_corners[2];
texture_binds[4] = texture_corners[1];
texture_binds[5] = texture_corners[3];
glBindBuffer(GL_ARRAY_BUFFER, OGLAttr::common_vertex_vbo);
glBufferData(GL_ARRAY_BUFFER, sizeof rectangle_vertex_data, rectangle_vertex_data, GL_DYNAMIC_DRAW);
OGLAttr::current_shader->set_coord_attribute(GL_FLOAT);
glBindBuffer(GL_ARRAY_BUFFER, OGLAttr::common_texture_vbo);
glBufferData(GL_ARRAY_BUFFER, sizeof texture_binds, &(texture_binds[0]), GL_DYNAMIC_DRAW);
OGLAttr::current_shader->set_texture_coord_attribute(GL_FLOAT);
glDrawArrays(GL_TRIANGLES, 0, num_triangles);
}
