Added random number generator

Fixed typo in calculate camera
Removed some warning

code/core/impl/math.c

@@ -160,4 +160,46 @@ Mat4x4FInv M4x4F_CameraView(V3f x, V3f y, V3f z, V3f p) {
 	return result;
 }
 
+// Random
 
+Random Random_Seed(U64 seed) {
+	Random result = { seed };
+	return result;
+}
+
+U64 Random_Next(Random *rnd) {
+	U64 result = rnd->state;
+
+	result ^= (result << 13);
+	result ^= (result >>  7);
+	result ^= (result << 17);
+
+	rnd->state = result;
+
+	return result;
+}
+
+F32 Random_F32(Random *rnd, F32 min, F32 max) {
+	F32 result = min + (Random_Unilateral(rnd) * (max - min));
+	return result;
+}
+
+F64 Random_F64(Random *rnd, F64 min, F64 max) {
+	F64 result = min + (Random_Unilateral(rnd) * (max - min));
+	return result;
+}
+
+U32 Random_U32(Random *rnd, U32 min, U32 max) {
+	U32 result = min + (U32) (Random_Unilateral(rnd) * (max - min));
+	return result;
+}
+
+F32 Random_Unilateral(Random *rnd) {
+	F32 result = Random_Next(rnd) / (F32) U64_MAX;
+	return result;
+}
+
+F32 Random_Bilateral(Random *rnd) {
+	F32 result = -1.0f + (2.0f * Random_Unilateral(rnd));
+	return result;
+}