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#include "primitives.h"
static int honey_mesh_lua_plane(lua_State* L)
{
float width, height;
honey_lua_parse_arguments(L, 1, 2,
HONEY_NUMBER, &width,
HONEY_NUMBER, &height);
honey_mesh* mesh = lua_newuserdata(L, sizeof(honey_mesh));
if (honey_mesh_new_textured_plane(mesh, width, height) != HONEY_OK) {
lua_pushstring(L, "error encountered while building plane");
lua_error(L);
}
return 1;
}
static int honey_mesh_lua_cube(lua_State* L)
{
float width, height, depth;
honey_lua_parse_arguments(L, 1, 3,
HONEY_NUMBER, &width,
HONEY_NUMBER, &height,
HONEY_NUMBER, &depth);
honey_mesh* mesh = lua_newuserdata(L, sizeof(honey_mesh));
if (honey_mesh_new_textured_cube(mesh, width, height, depth) != HONEY_OK) {
lua_pushstring(L, "error encountered while building plane");
lua_error(L);
}
return 1;
}
void honey_setup_primitives(lua_State* L)
{
honey_lua_create_table
(L, 2,
HONEY_FUNCTION, "plane", honey_mesh_lua_plane,
HONEY_FUNCTION, "cube", honey_mesh_lua_cube);
lua_setfield(L, -2, "primitives");
}
/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
honey_result honey_mesh_new_textured_plane(honey_mesh* mesh,
float width,
float height) {
float x0 = 0;
float y0 = 0;
float x1 = width;
float y1 = height;
float vertices[] = {
/* position normal uv */
x0, y0, 0, 0, 0, 1, 0, 0,
x1, y0, 0, 0, 0, 1, 1, 0,
x0, y1, 0, 0, 0, 1, 0, 1,
x1, y1, 0, 0, 0, 1, 1, 1 };
unsigned int indices[] = {
0, 1, 2,
3, 2, 1 };
unsigned int attrib_sizes[] = { 3, 3, 2 };
honey_result result = honey_mesh_new(mesh,
vertices, 4,
3, attrib_sizes,
indices, 6);
return result;
}
/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
honey_result honey_mesh_new_cube(honey_mesh* mesh,
float width,
float height,
float depth) {
float x0 = 0;
float y0 = 0;
float z0 = 0;
float x1 = width;
float y1 = height;
float z1 = depth;
float vertices[] = {
/* position normal tex coord */
/* back face */
x0, y0, z0, 0, 0, -1,
x1, y0, z0, 0, 0, -1,
x0, y1, z0, 0, 0, -1,
x1, y1, z0, 0, 0, -1,
/* front face */
x0, y0, z1, 0, 0, 1,
x1, y0, z1, 0, 0, 1,
x0, y1, z1, 0, 0, 1,
x1, y1, z1, 0, 0, 1,
/* left face */
x0, y0, z0, -1, 0, 0,
x0, y1, z0, -1, 0, 0,
x0, y0, z1, -1, 0, 0,
x0, y1, z1, -1, 0, 0,
/* right face */
x1, y0, z0, 1, 0, 0,
x1, y1, z0, 1, 0, 0,
x1, y0, z1, 1, 0, 0,
x1, y1, z1, 1, 0, 0,
/* bottom face */
x0, y0, z0, 0, -1, 0,
x1, y0, z0, 0, -1, 0,
x0, y0, z1, 0, -1, 0,
x1, y0, z1, 0, -1, 0,
/* top face */
x0, y1, z0, 0, 1, 0,
x1, y1, z0, 0, 1, 0,
x0, y1, z1, 0, 1, 0,
x1, y1, z1, 0, 1, 0 };
unsigned int indices[] = {
0, 1, 2,
1, 2, 3,
4, 5, 6,
5, 6, 7,
8, 9, 10,
9, 10, 11,
12, 13, 14,
13, 14, 15,
16, 17, 18,
17, 18, 19,
20, 21, 22,
21, 22, 23 };
unsigned int attrib_sizes[] = { 3, 3 };
honey_result result = honey_mesh_new(mesh,
vertices, 24,
2, attrib_sizes,
indices, 36);
return result;
}
/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
honey_result honey_mesh_new_textured_cube(honey_mesh* mesh,
float width,
float height,
float depth) {
float x0 = 0;
float y0 = 0;
float z0 = 0;
float x1 = width;
float y1 = height;
float z1 = depth;
float vertices[] = {
/* position normal tex coord */
/* back face */
x0, y0, z0, 0, 0, -1, 0, 0,
x1, y0, z0, 0, 0, -1, 1, 0,
x0, y1, z0, 0, 0, -1, 0, 1,
x1, y1, z0, 0, 0, -1, 1, 1,
/* front face */
x0, y0, z1, 0, 0, 1, 0, 0,
x1, y0, z1, 0, 0, 1, 1, 0,
x0, y1, z1, 0, 0, 1, 0, 1,
x1, y1, z1, 0, 0, 1, 1, 1,
/* left face */
x0, y0, z0, -1, 0, 0, 0, 0,
x0, y1, z0, -1, 0, 0, 1, 0,
x0, y0, z1, -1, 0, 0, 0, 1,
x0, y1, z1, -1, 0, 0, 1, 1,
/* right face */
x1, y0, z0, 1, 0, 0, 0, 0,
x1, y1, z0, 1, 0, 0, 1, 0,
x1, y0, z1, 1, 0, 0, 0, 1,
x1, y1, z1, 1, 0, 0, 1, 1,
/* bottom face */
x0, y0, z0, 0, -1, 0, 0, 0,
x1, y0, z0, 0, -1, 0, 1, 0,
x0, y0, z1, 0, -1, 0, 0, 1,
x1, y0, z1, 0, -1, 0, 1, 1,
/* top face */
x0, y1, z0, 0, 1, 0, 0, 0,
x1, y1, z0, 0, 1, 0, 1, 0,
x0, y1, z1, 0, 1, 0, 0, 1,
x1, y1, z1, 0, 1, 0, 1, 1 };
unsigned int indices[] = {
0, 1, 2,
1, 2, 3,
4, 5, 6,
5, 6, 7,
8, 9, 10,
9, 10, 11,
12, 13, 14,
13, 14, 15,
16, 17, 18,
17, 18, 19,
20, 21, 22,
21, 22, 23 };
unsigned int attrib_sizes[] = { 3, 3, 2 };
honey_result result;
result = honey_mesh_new(mesh, vertices, 24,
3, attrib_sizes,
indices, 36);
return result;
}
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