Add Mat4 translation function

Implemented creating a Mat4 that does translation.
This commit is contained in:
Stephen Seo 2024-04-29 14:09:49 +09:00
parent 954c48f6f9
commit ecf5ce1745
3 changed files with 25 additions and 0 deletions

View file

@ -457,6 +457,11 @@ SC_SACD_Mat4 SC_SACD_Rotation_Mat4_ZAxis(float z_radians) {
return mat; return mat;
} }
SC_SACD_Mat4 SC_SACD_Translate_Mat4(float x, float y, float z) {
return SC_SACD_Mat4{0.0F, 0.0F, 0.0F, x, 0.0F, 1.0F, 0.0F, y,
0.0F, 0.0F, 1.0F, z, 0.0F, 0.0F, 0.0F, 1.0F};
}
SC_SACD_Vec3 SC_SACD_Closest_Point_Dir_Normalized(const SC_SACD_Vec3 *pos, SC_SACD_Vec3 SC_SACD_Closest_Point_Dir_Normalized(const SC_SACD_Vec3 *pos,
const SC_SACD_Vec3 *dir, const SC_SACD_Vec3 *dir,
const SC_SACD_Vec3 *point) { const SC_SACD_Vec3 *point) {

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@ -111,6 +111,8 @@ SC_SACD_EXPORT SC_SACD_Mat4 SC_SACD_Rotation_Mat4_XAxis(float x_radians);
SC_SACD_EXPORT SC_SACD_Mat4 SC_SACD_Rotation_Mat4_YAxis(float y_radians); SC_SACD_EXPORT SC_SACD_Mat4 SC_SACD_Rotation_Mat4_YAxis(float y_radians);
SC_SACD_EXPORT SC_SACD_Mat4 SC_SACD_Rotation_Mat4_ZAxis(float z_radians); SC_SACD_EXPORT SC_SACD_Mat4 SC_SACD_Rotation_Mat4_ZAxis(float z_radians);
SC_SACD_EXPORT SC_SACD_Mat4 SC_SACD_Translate_Mat4(float x, float y, float z);
SC_SACD_EXPORT SC_SACD_Vec3 SC_SACD_Closest_Point_Dir_Normalized( SC_SACD_EXPORT SC_SACD_Vec3 SC_SACD_Closest_Point_Dir_Normalized(
const SC_SACD_Vec3 *pos, const SC_SACD_Vec3 *dir, const SC_SACD_Vec3 *pos, const SC_SACD_Vec3 *dir,
const SC_SACD_Vec3 *point); const SC_SACD_Vec3 *point);

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@ -543,6 +543,24 @@ int main() {
CHECK_FLOAT(result.z, std::sqrt(2.0F) / 2.0F); CHECK_FLOAT(result.z, std::sqrt(2.0F) / 2.0F);
} }
} }
// Mat4 rotation and translation.
{
SC_SACD_Mat4 mat_a = SC_SACD_Translate_Mat4(1.0F, 1.0F, 1.0F);
SC_SACD_Mat4 mat_b =
SC_SACD_Rotation_Mat4_ZAxis(std::numbers::pi_v<float> / 4.0F);
mat_a = SC_SACD_Mat4_Mult(&mat_b, &mat_a);
mat_b = SC_SACD_Translate_Mat4(0.0F, 0.0F, -1.0F);
mat_a = SC_SACD_Mat4_Mult(&mat_b, &mat_a);
{
auto result =
SC_SACD_Mat4_Vec3_Mult(&mat_a, SC_SACD_Vec3{0.0F, 0.0F, 0.0F});
CHECK_FLOAT(result.x, 0.0F);
CHECK_FLOAT(result.z, 0.0F);
CHECK_FLOAT(result.y, std::sqrt(2.0F));
}
}
std::cout << "Checks checked: " << checks_checked << '\n' std::cout << "Checks checked: " << checks_checked << '\n'
<< "Checks passed: " << checks_passed << '\n'; << "Checks passed: " << checks_passed << '\n';