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// Copyright (c) 2019-2021 Alexander Medvednikov. All rights reserved.
// Use of this source code is governed by an MIT license
// that can be found in the LICENSE file.
// might need special case for this
// import gl
import glm
fn cmp(a f32, b f32) bool {
return int(a * 1000) == int(b * 1000)
}
fn test_ortho() {
projection := glm.ortho(0, 200, 400, 0)
$if debug {
println(unsafe { projection.data[0] })
}
unsafe {
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)
/*
// for debugging broken tetris in gg.o
# projection.data[0]=0.010000;
# projection.data[1]=0.000000;
# projection.data[2]=0.000000;
# projection.data[3]=0.000000;
# projection.data[4]=0.000000;
# projection.data[5]=-0.005000;
# projection.data[6]=0.000000;
# projection.data[7]=0.000000;
# projection.data[8]=0.000000;
# projection.data[9]=0.000000;
# projection.data[10]=1.000000;
# projection.data[11]=0.000000;
# projection.data[12]=-1.000000;
# projection.data[13]=1.000000;
# projection.data[14]=0.000000;
# projection.data[15]=1.000000;
*/
}
fn test_rotate() {
$if debug {
println('rotate')
}
mut m := glm.identity()
m = glm.scale(m, glm.vec3(2, 2, 2))
$if debug {
println(m)
}
m = glm.rotate_z(m, 1)
$if debug {
println(m)
}
mut m1 := glm.identity()
mut m2 := glm.identity()
m1 = glm.rotate(1, glm.vec3(1, 0, 0), m1)
m2 = glm.rotate(1, glm.vec3(0, 1, 0), m2)
mut same := true
for i in 0 .. 15 {
if unsafe { m1.data[i] } != unsafe { m2.data[i] } {
same = false
}
}
assert !same
}
fn test_translate() {
mut m := glm.identity()
m = glm.translate(m, glm.vec3(0, 0, -0.5))
$if debug {
println(m)
}
unsafe {
assert m.data[0] == 1.0
assert m.data[1] == 0.0
assert m.data[2] == 0.0
assert m.data[3] == 0.0
//
assert m.data[4] == 0.0
assert m.data[5] == 1.0
assert m.data[6] == 0.0
assert m.data[7] == 0.0
assert m.data[8] == 0.0
assert m.data[9] == 0.0
assert m.data[10] == 1.0
assert m.data[11] == 0.0
//
assert m.data[12] == 0.0
assert m.data[13] == 0.0
assert m.data[14] == -0.5
assert m.data[15] == 1.0
}
}
fn f32_calloc(n int) &f32 {
return voidptr(vcalloc(n * int(sizeof(f32))))
}
fn test_mult1() {
mut adata := f32_calloc(16)
unsafe {
adata[1 * 4 + 1] = 6
adata[2 * 4 + 3] = 2
adata[0 * 4 + 2] = 3
adata[2 * 4 + 1] = 1
}
mut bdata := f32_calloc(16)
unsafe {
bdata[1 * 4 + 1] = -2
bdata[2 * 4 + 3] = 1
bdata[0 * 4 + 2] = 6
bdata[2 * 4 + 1] = -3
}
mut expected := f32_calloc(16)
unsafe {
expected[0 * 4 + 0] = 0 // 0*0+0*0+0*6+0*0
expected[0 * 4 + 1] = 6 // 0*0+0*6+1*6+0*0
expected[0 * 4 + 2] = 0 // 3*0+0*0+0*6+0*0
expected[0 * 4 + 3] = 12 // 0*0+0*0+2*6+0*0
expected[1 * 4 + 0] = 0 // 0*0+0*-2+0*0+0*0
expected[1 * 4 + 1] = -12 // 0*0+6*-2+1*0+0*0
expected[1 * 4 + 2] = 0 // 3*0+0*-2+0*0+0*0
expected[1 * 4 + 3] = 0 // 0*0+0*-2+2*0+0*0
expected[2 * 4 + 0] = 0 // 0*0+0*-3+0*0+0*1
expected[2 * 4 + 1] = -18 // 0*0+6*-3+1*0+0*1
expected[2 * 4 + 2] = 0 // 3*0+0*-3+0*0+0*1
expected[2 * 4 + 3] = 0 // 0*0+0*-3+2*0+0*1
expected[3 * 4 + 0] = 0 // 0*0+0*0+0*0+0*0
expected[3 * 4 + 1] = 0 // 0*0+6*0+1*0+0*0
expected[3 * 4 + 2] = 0 // 3*0+0*0+0*0+0*0
expected[3 * 4 + 3] = 0 // 0*0+0*0+2*0+0*0
}
mut a := glm.Mat4{adata}
b := glm.Mat4{bdata}
a = glm.mult(a, b)
for i in 0 .. 15 {
assert unsafe { a.data[i] } == unsafe { expected[i] }
}
}
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