v/glm/glm_test.v

// Copyright (c) 2019 Alexander Medvednikov. All rights reserved.
// Use of this source code is governed by an MIT license
// that can be found in the LICENSE file.

import os
import gl
import gg

fn cmp(a, b float) bool {
	return int(a * 1000) == int(b * 1000)
}

fn test_ortho() {
	projection := glm.ortho(0, 200, 400, 0)
	println(projection.data[0])
	assert cmp(projection.data[0], 0.01)
	assert cmp(projection.data[1], 0.000000)
	assert cmp(projection.data[2], 0.000000)
	assert cmp(projection.data[3], 0.000000)
	assert cmp(projection.data[4], 0.000000)
	assert cmp(projection.data[5], - 0.005000)
	assert cmp(projection.data[6], 0.000000)
	assert cmp(projection.data[7], 0.000000)
	assert cmp(projection.data[8], 0.000000)
	assert cmp(projection.data[9], 0.000000)
	assert cmp(projection.data[10], 1.000000)
	assert cmp(projection.data[11], 0.000000)
	assert cmp(projection.data[12], - 1.000000)
	assert cmp(projection.data[13], 1.000000)
	assert cmp(projection.data[14], 0.000000)
	assert cmp(projection.data[15], 1.000000)
	// f := gg.ortho(1,2,3,4)
}

fn test_rotate() {
	println('rotate')
	mut m := glm.identity()
	m = glm.scale(m, glm.vec3(2, 2, 2))
	println(m)
	m = glm.rotate_z(m, 1)
	println(m)
}

fn test_translate() {
	mut m := glm.identity()
	m = glm.translate(m, glm.vec3(0, 0, - 0.5))
	println(m)
	// TODO 
	// mat4x4((1.000000, 0.000000, 0.000000, 0.000000),
	// (0.000000, 1.000000, 0.000000, 0.000000),
	// (0.000000, 0.000000, 1.000000, 0.000000),
	// (0.000000, 0.000000, -0.500000, 1.000000))
}