mirror of https://github.com/bjornbytes/lovr.git
56 lines
1.8 KiB
Lua
56 lines
1.8 KiB
Lua
-- Usage: lovr etc/monkeycrush.lua > etc/monkey.h
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local etc = lovr.filesystem.getSource()
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local success, model = assert(pcall(lovr.data.newModelData, 'monkey.glb'))
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local min, max = lovr.math.newVec3(math.huge), lovr.math.newVec3(-math.huge)
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for i = 1, model:getMeshVertexCount(1) do
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local x, y, z, nx, ny, nz = model:getMeshVertex(1, i)
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min.x, min.y, min.z = math.min(x, min.x), math.min(y, min.y), math.min(z, min.z)
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max.x, max.y, max.z = math.max(x, max.x), math.max(y, max.y), math.max(z, max.z)
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end
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local scale = .5
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min:mul(scale)
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max:mul(scale)
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local center = Vec3(max + min):mul(.5)
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local extent = Vec3(max - min)
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local halfExtent = extent / 2
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local bounds = { center[1], center[2], center[3], halfExtent[1], halfExtent[2], halfExtent[3] }
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io.write(('float monkey_bounds[6] = { %ff, %ff, %ff, %ff, %ff, %ff };\n'):format(unpack(bounds)))
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io.write(('float monkey_offset[3] = { %ff, %ff, %ff };\n'):format(min:unpack()))
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io.write('\n')
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io.write('uint8_t monkey_vertices[] = {\n')
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for i = 1, model:getMeshVertexCount(1) do
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local x, y, z, nx, ny, nz = model:getMeshVertex(1, i)
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local position = vec3(x, y, z):mul(scale)
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local normal = vec3(nx, ny, nz)
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local qx, qy, qz = ((position - min) / extent * 255 + .5):unpack()
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local qnx, qny, qnz = ((normal / 2 + .5) * 255 + .5):unpack()
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qx, qy, qz = math.floor(qx), math.floor(qy), math.floor(qz)
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qnx, qny, qnz = math.floor(qnx), math.floor(qny), math.floor(qnz)
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io.write((' %d, %d, %d, %d, %d, %d,\n'):format(qx, qy, qz, qnx, qny, qnz))
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lovr.math.drain()
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end
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io.write('};\n\n')
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io.write('uint16_t monkey_indices[] = {\n ')
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for i = 1, model:getMeshIndexCount(1) do
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local index = model:getMeshIndex(1, i) - 1
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io.write((' %d,'):format(index))
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if i % 10 == 0 then
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io.write('\n ')
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end
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end
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io.write('\n};\n')
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lovr.event.quit()
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