97 lines
1.8 KiB
C++
97 lines
1.8 KiB
C++
#include <math.h>
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struct Vec3 {
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float x, y, z;
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};
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Vec3 create_Vec3 (float x, float y, float z) {
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Vec3 result = {x, y, z};
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return result;
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}
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Vec3 Vec3_add (const Vec3& a, const Vec3& b) {
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Vec3 result = {a.x + b.x, a.y + b.y, a.z + b.z};
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return result;
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}
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Vec3 Vec3_subtract (const Vec3& a, const Vec3& b) {
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Vec3 result = {a.x - b.x, a.y - b.y, a.z - b.z};
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return result;
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}
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Vec3 Vec3_scalar (const Vec3& a, const float scalar) {
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Vec3 result = {a.x*scalar, a.y*scalar, a.z*scalar};
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return result;
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}
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float Vec3_dot (const Vec3& a, const Vec3& b) {
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float result = a.x*b.x + a.y*b.y + a.z*b.z;
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return result;
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}
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Vec3 Vec3_cross (const Vec3& a, const Vec3& b) {
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Vec3 result = {a.y*b.z - a.z*b.y, a.z*b.x - a.x*b.z, a.x*b.y - a.y*b.x};
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return result;
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}
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float Vec3_length (const Vec3& a) {
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float result = sqrt(a.x*a.x + a.y*a.y + a.z*a.z);
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return result;
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}
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Vec3 Vec3_normalize (const Vec3& a) {
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Vec3 result;
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float len = sqrt(a.x*a.x + a.y*a.y + a.z*a.z);
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if (len > 0.0f) {
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return result = {a.x/len, a.y/len, a.z/len};
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} else {
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return a;
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}
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}
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struct Mat4{
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float m4[16];
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};
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Mat4 Mat4_createMatrix (float InitialValue) {
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Mat4 result;
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for (int i = 0; i < 16; i++) {
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result.m4[i] = {InitialValue};
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}
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return result;
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}
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Mat4 Mat4_createZeroes () {
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Mat4 result = {0};
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return result;
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}
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Mat4 Mat4_createIdentity () {
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Mat4 result = {0};
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result.m4[0] = 1;
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result.m4[5] = 1;
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result.m4[10] = 1;
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result.m4[15] = 1;
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return result;
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}
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Mat4 Mat4_createTranslation (float x, float y, float z) {
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Mat4 result = {0};
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result.m4[0] = 1;
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result.m4[5] = 1;
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result.m4[10] = 1;
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result.m4[15] = 1;
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result.m4[12] = x;
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result.m4[13] = y;
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result.m4[14] = z;
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return result;
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}
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//translate
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//rotate
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//scale
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//perspective
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