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v/vlib/glm/glm_test.v

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// Copyright (c) 2019-2020 Alexander Medvednikov. All rights reserved.
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// Use of this source code is governed by an MIT license
// that can be found in the LICENSE file.
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// might need special case for this
// import gl
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import glm
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fn cmp(a, b f32) bool {
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return int(a * 1000) == int(b * 1000)
}
fn test_ortho() {
projection := glm.ortho(0, 200, 400, 0)
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$if debug {
println(projection.data[0])
}
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assert cmp(projection.data[0], 0.01)
assert cmp(projection.data[1], 0.000000)
assert cmp(projection.data[2], 0.000000)
assert cmp(projection.data[3], 0.000000)
assert cmp(projection.data[4], 0.000000)
assert cmp(projection.data[5], - 0.005000)
assert cmp(projection.data[6], 0.000000)
assert cmp(projection.data[7], 0.000000)
assert cmp(projection.data[8], 0.000000)
assert cmp(projection.data[9], 0.000000)
assert cmp(projection.data[10], 1.000000)
assert cmp(projection.data[11], 0.000000)
assert cmp(projection.data[12], - 1.000000)
assert cmp(projection.data[13], 1.000000)
assert cmp(projection.data[14], 0.000000)
assert cmp(projection.data[15], 1.000000)
// f := gg.ortho(1,2,3,4)
/*
// for debugging broken tetris in gg.o
# projection.data[0]=0.010000;
# projection.data[1]=0.000000;
# projection.data[2]=0.000000;
# projection.data[3]=0.000000;
# projection.data[4]=0.000000;
# projection.data[5]=-0.005000;
# projection.data[6]=0.000000;
# projection.data[7]=0.000000;
# projection.data[8]=0.000000;
# projection.data[9]=0.000000;
# projection.data[10]=1.000000;
# projection.data[11]=0.000000;
# projection.data[12]=-1.000000;
# projection.data[13]=1.000000;
# projection.data[14]=0.000000;
# projection.data[15]=1.000000;
*/
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}
fn test_rotate() {
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$if debug {
println('rotate')
}
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mut m := glm.identity()
m = glm.scale(m, glm.vec3(2, 2, 2))
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$if debug {
println(m)
}
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m = glm.rotate_z(m, 1)
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$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 m1.data[i] != m2.data[i] {
same = false
}
}
assert !same
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}
fn test_translate() {
mut m := glm.identity()
m = glm.translate(m, glm.vec3(0, 0, - 0.5))
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$if debug {
println(m)
}
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
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}
fn f32_calloc(n int) &f32 {
return voidptr(vcalloc(n * int(sizeof(f32))))
}
fn test_mult1() {
mut adata := f32_calloc(16)
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)
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)
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}
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a = glm.mult(a, b)
for i in 0..15 {
assert a.data[i] == expected[i]
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}
}