feat: rework math files

- add SSE functions
- remove vec3 / mat3

src/math/mat4.c

@@ -1,5 +1,15 @@
 #include "mat4.h"
 #include <string.h>
+#include <stdio.h>
+
+
+#if defined(__x86_64__) || defined(__i386__)
+#include <xmmintrin.h>  // SSE
+#elif defined(__aarch64__) || defined(__arm64__) || defined(__ARM_NEON)
+#include <arm_neon.h>   // NEON
+#else
+#warning "SIMD intrinsics not enabled for this architecture"
+#endif
 
 Mat4_t mat4(const float arr[16]) 
 {
@@ -26,10 +36,30 @@ Mat4_t mat4_ity(void)
 Mat4_t mat4_add(const Mat4_t* m1, const Mat4_t* m2) 
 {
     Mat4_t mat;
-    
-    for(int i = 0; i<16; i++) {
+
+#if defined(__x86_64__) || defined(__i386__)
+    // SSE : addition 4 floats en parallèle
+    for (int i = 0; i < 16; i += 4) {
+        __m128 a = _mm_loadu_ps(&m1->m[i]);
+        __m128 b = _mm_loadu_ps(&m2->m[i]);
+        __m128 c = _mm_add_ps(a, b);
+        _mm_storeu_ps(&mat.m[i], c);
+    }
+#elif defined(__aarch64__)
+    printf("hello world");
+    // NEON : addition 4 floats en parallèle
+    for (int i = 0; i < 16; i += 4) {
+        float32x4_t a = vld1q_f32(&m1->m[i]);
+        float32x4_t b = vld1q_f32(&m2->m[i]);
+        float32x4_t c = vaddq_f32(a, b);
+        vst1q_f32(&mat.m[i], c);
+    }
+#else
+    // Fallback classique
+    for (int i = 0; i < 16; i++) {
         mat.m[i] = m1->m[i] + m2->m[i];
     }
+#endif
 
     return mat;
 }