void gim_trimesh_get_triangle_data(GIM_TRIMESH * trimesh, GUINT32 triangle_index, GIM_TRIANGLE_DATA * tri_data)
{
vec3f * transformed_vertices = GIM_BUFFER_ARRAY_POINTER(vec3f,trimesh->m_transformed_vertex_buffer,0);
GUINT32 * triangle_indices = GIM_BUFFER_ARRAY_POINTER(GUINT32,trimesh->m_tri_index_buffer,triangle_index*3);
//Copy the vertices
VEC_COPY(tri_data->m_vertices[0],transformed_vertices[triangle_indices[0]]);
VEC_COPY(tri_data->m_vertices[1],transformed_vertices[triangle_indices[1]]);
VEC_COPY(tri_data->m_vertices[2],transformed_vertices[triangle_indices[2]]);
//Get the planes
GIM_TRIPLANES_CACHE * planes = GIM_DYNARRAY_POINTER(GIM_TRIPLANES_CACHE,trimesh->m_planes_cache_buffer);
planes += triangle_index;
//verify planes cache
GUINT32 bit_eval;
GIM_BITSET_GET(trimesh->m_planes_cache_bitset,triangle_index,bit_eval);
if(bit_eval == 0)// Needs to calc the planes
{
//Calc the face plane
TRIANGLE_PLANE(tri_data->m_vertices[0],tri_data->m_vertices[1],tri_data->m_vertices[2],planes->m_planes[0]);
//Calc the edge 1
EDGE_PLANE(tri_data->m_vertices[0],tri_data->m_vertices[1],(planes->m_planes[0]),(planes->m_planes[1]));
//Calc the edge 2
EDGE_PLANE(tri_data->m_vertices[1],tri_data->m_vertices[2],(planes->m_planes[0]),(planes->m_planes[2]));
//Calc the edge 3
EDGE_PLANE(tri_data->m_vertices[2],tri_data->m_vertices[0],(planes->m_planes[0]), (planes->m_planes[3]));
//mark
GIM_BITSET_SET(trimesh->m_planes_cache_bitset,triangle_index);
}
VEC_COPY_4((tri_data->m_planes.m_planes[0]),(planes->m_planes[0]));//face plane
VEC_COPY_4((tri_data->m_planes.m_planes[1]),(planes->m_planes[1]));//edge1
VEC_COPY_4((tri_data->m_planes.m_planes[2]),(planes->m_planes[2]));//edge2
VEC_COPY_4((tri_data->m_planes.m_planes[3]),(planes->m_planes[3]));//edge3
}
/*!
*/
SIMD_FORCE_INLINE GUINT clip_triangle(
const btVector4 & tri_plane,
const btVector3 * tripoints,
const btVector3 * srcpoints,
btVector3 * clip_points)
{
// edge 0
btVector4 edgeplane;
EDGE_PLANE(tripoints[0],tripoints[1],tri_plane,edgeplane);
GUINT clipped_count = PLANE_CLIP_TRIANGLE3D(
edgeplane,srcpoints[0],srcpoints[1],srcpoints[2],temp_points);
if(clipped_count == 0) return 0;
// edge 1
EDGE_PLANE(tripoints[1],tripoints[2],tri_plane,edgeplane);
clipped_count = PLANE_CLIP_POLYGON3D(
edgeplane,temp_points,clipped_count,temp_points1);
if(clipped_count == 0) return 0;
// edge 2
EDGE_PLANE(tripoints[2],tripoints[0],tri_plane,edgeplane);
clipped_count = PLANE_CLIP_POLYGON3D(
edgeplane,temp_points1,clipped_count,clip_points);
return clipped_count;
/*GUINT i0 = (tri_plane.closestAxis()+1)%3;
GUINT i1 = (i0+1)%3;
// edge 0
btVector3 temp_points[MAX_TRI_CLIPPING];
btVector3 temp_points1[MAX_TRI_CLIPPING];
GUINT clipped_count= PLANE_CLIP_TRIANGLE_GENERIC(
0,srcpoints[0],srcpoints[1],srcpoints[2],temp_points,
DISTANCE_EDGE(tripoints[0],tripoints[1],i0,i1));
if(clipped_count == 0) return 0;
// edge 1
clipped_count = PLANE_CLIP_POLYGON_GENERIC(
0,temp_points,clipped_count,temp_points1,
DISTANCE_EDGE(tripoints[1],tripoints[2],i0,i1));
if(clipped_count == 0) return 0;
// edge 2
clipped_count = PLANE_CLIP_POLYGON_GENERIC(
0,temp_points1,clipped_count,clipped_points,
DISTANCE_EDGE(tripoints[2],tripoints[0],i0,i1));
return clipped_count;*/
}
