/
cube_texture_and_coords.lua
111 lines (90 loc) · 1.63 KB
/
cube_texture_and_coords.lua
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local ffi = require "ffi"
-- Spatial coordinates for the cube
quadx = ffi.new("GLbyte[?]", 6*4*3, {
-- FRONT
-10, -10, 10,
10, -10, 10,
-10, 10, 10,
10, 10, 10,
-- BACK
-10, -10, -10,
-10, 10, -10,
10, -10, -10,
10, 10, -10,
-- LEFT
-10, -10, 10,
-10, 10, 10,
-10, -10, -10,
-10, 10, -10,
-- RIGHT
10, -10, -10,
10, 10, -10,
10, -10, 10,
10, 10, 10,
-- TOP
-10, 10, 10,
10, 10, 10,
-10, 10, -10,
10, 10, -10,
-- BOTTOM
-10, -10, 10,
-10, -10, -10,
10, -10, 10,
10, -10, -10,
});
-- Texture coordinates for the quad.
texCoords = ffi.new("GLfloat[?]", 6 * 4 * 2, {
0, 0,
0, 1,
1, 0,
1, 1,
0, 0,
0, 1,
1, 0,
1, 1,
0, 0,
0, 1,
1, 0,
1, 1,
0, 0,
0, 1,
1, 0,
1, 1,
0, 0,
0, 1,
1, 0,
1, 1,
0, 0,
0, 1,
1, 0,
1, 1
});
-- Colors are invisible when textures appear on all 6 faces.
-- If textures are disabled, e.g. by commenting out glEnable(GL_TEXTURE_2D),
-- the colours will appear.
colorsf = ffi.new("float[?]", 6*4*4, {
1, 0, 0, 1, --red
1, 0, 0, 1,
1, 0, 0, 1,
1, 0, 0, 1,
0, 1, 0, 1, -- blue
0, 1, 0, 1,
0, 1, 0, 1,
0, 1, 0, 1,
0, 0, 1, 1, -- green
0, 0, 1, 1,
0, 0, 1, 1,
0, 0, 1, 1,
0, 0.5, 0.5, 1, -- teal
0, 0.5, 0.5, 1,
0, 0.5, 0.5, 1,
0, 0.5, 0.5, 1,
0.5, 0.5, 0, 1, -- yellow
0.5, 0.5, 0, 1,
0.5, 0.5, 0, 1,
0.5, 0.5, 0, 1,
0.5, 0, 0.5, 1, -- purple
0.5, 0, 0.5, 1,
0.5, 0, 0.5, 1,
0.5, 0, 0.5, 1
});