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#include <math/mat4.h>
#include <math/float.h>
#include "test.h"
#include <stdio.h>
static const float eps = 1e-9;
static inline void print_mat4(mat4 m) {
printf("\n");
for (int i = 0; i < 4; ++i) {
for (int j = 0; j < 4; ++j) {
printf("%6.3f ", mat4_at(m, i, j));
}
printf("\n");
}
}
TEST_CASE(lookat_right) {
const mat4 m = mat4_lookat(/*position=*/vec3_make(0, 0, 0),
/*target=*/vec3_make(1, 0, 0),
/*up=*/vec3_make(0, 1, 0));
const mat4 expected = mat4_from_array((const float*)(float[4][4]){
{0, 0, 1, 0},
{0, 1, 0, 0},
{1, 0, 0, 0},
{0, 0, 0, 1},
});
TEST_TRUE(mat4_eq(m, expected, eps));
}
TEST_CASE(lookat_left) {
const mat4 m = mat4_lookat(/*position=*/vec3_make(0, 0, 0),
/*target=*/vec3_make(-1, 0, 0),
/*up=*/vec3_make(0, 1, 0));
const mat4 expected = mat4_from_array((const float*)(float[4][4]){
{0, 0, -1, 0},
{0, 1, 0, 0},
{-1, 0, 0, 0},
{0, 0, 0, 1},
});
TEST_TRUE(mat4_eq(m, expected, eps));
}
TEST_CASE(lookat_up) {
const mat4 m = mat4_lookat(/*position=*/vec3_make(0, 0, 0),
/*target=*/vec3_make(0, 1, 0),
/*up=*/vec3_make(0, 0, 1));
const mat4 expected = mat4_from_array((const float*)(float[4][4]){
{1, 0, 0, 0},
{0, 0, 1, 0},
{0, 1, 0, 0},
{0, 0, 0, 1},
});
TEST_TRUE(mat4_eq(m, expected, eps));
}
TEST_CASE(lookat_down) {
const mat4 m = mat4_lookat(/*position=*/vec3_make(0, 0, 0),
/*target=*/vec3_make(0, -1, 0),
/*up=*/vec3_make(0, 0, -1));
const mat4 expected = mat4_from_array((const float*)(float[4][4]){
{1, 0, 0, 0},
{0, 0, -1, 0},
{0, -1, 0, 0},
{0, 0, 0, 1},
});
TEST_TRUE(mat4_eq(m, expected, eps));
}
TEST_CASE(lookat_forward) {
const mat4 m = mat4_lookat(/*position=*/vec3_make(0, 0, 0),
/*target=*/vec3_make(0, 0, -1),
/*up=*/vec3_make(0, 1, 0));
const mat4 expected = mat4_from_array((const float*)(float[4][4]){
{1, 0, 0, 0},
{0, 1, 0, 0},
{0, 0, -1, 0},
{0, 0, 0, 1},
});
TEST_TRUE(mat4_eq(m, expected, eps));
}
TEST_CASE(lookat_back) {
const mat4 m = mat4_lookat(/*position=*/vec3_make(0, 0, 0),
/*target=*/vec3_make(0, 0, 1),
/*up=*/vec3_make(0, 1, 0));
const mat4 expected = mat4_from_array((const float*)(float[4][4]){
{-1, 0, 0, 0},
{0, 1, 0, 0},
{0, 0, 1, 0},
{0, 0, 0, 1},
});
TEST_TRUE(mat4_eq(m, expected, eps));
}
int main() { return 0; }
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