X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?p=gph-math;a=blobdiff_plain;f=src%2Fvector4.inl;fp=src%2Fvector4.inl;h=c37eed1c85d5c6ec5b37e0904ac9c46de48e7914;hp=0000000000000000000000000000000000000000;hb=016badf08fbd4db92e6ee6e2ad74e7e61c5505e3;hpb=bdeb1048917667c00f540c17f397443e8f6f76bf

diff --git a/src/vector4.inl b/src/vector4.inl
new file mode 100644
index 0000000..c37eed1
--- /dev/null
+++ b/src/vector4.inl
@@ -0,0 +1,252 @@
+inline void Vector4::normalize()
+{
+	float len = (float)sqrt(x * x + y * y + z * z + w * w);
+	if(len != 0.0f) {
+		x /= len;
+		y /= len;
+		z /= len;
+		w /= len;
+	}
+}
+
+inline float &Vector4::operator[] (int idx)
+{
+	return idx == 0 ? x : (idx == 1 ? y : (idx == 2 ? z : w));
+}
+
+inline const float &Vector4::operator[] (int idx) const
+{
+	return idx == 0 ? x : (idx == 1 ? y : (idx == 2 ? z : w));
+}
+
+inline Vector4 operator -(const Vector4 &v)
+{
+	return Vector4(-v.x, -v.y, -v.z, -v.w);
+}
+
+inline Vector4 operator +(const Vector4 &a, const Vector4 &b)
+{
+	return Vector4(a.x + b.x, a.y + b.y, a.z + b.z, a.w + b.w);
+}
+
+inline Vector4 operator -(const Vector4 &a, const Vector4 &b)
+{
+	return Vector4(a.x - b.x, a.y - b.y, a.z - b.z, a.w - b.w);
+}
+
+inline Vector4 operator *(const Vector4 &a, const Vector4 &b)
+{
+	return Vector4(a.x * b.x, a.y * b.y, a.z * b.z, a.w * b.w);
+}
+
+inline Vector4 operator /(const Vector4 &a, const Vector4 &b)
+{
+	return Vector4(a.x / b.x, a.y / b.y, a.z / b.z, a.w / b.w);
+}
+
+inline Vector4 operator *(const Vector4 &v, float s)
+{
+	return Vector4(v.x * s, v.y * s, v.z * s, v.w * s);
+}
+
+inline Vector4 operator *(float s, const Vector4 &v)
+{
+	return Vector4(s * v.x, s * v.y, s * v.z, s * v.w);
+}
+
+inline Vector4 operator /(const Vector4 &v, float s)
+{
+	return Vector4(v.x / s, v.y / s, v.z / s, v.w / s);
+}
+
+inline Vector4 operator /(float s, const Vector4 &v)
+{
+	return Vector4(s / v.x, s / v.y, s / v.z, s / v.w);
+}
+
+inline Vector4 &operator +=(Vector4 &a, const Vector4 &b)
+{
+	a.x += b.x;
+	a.y += b.y;
+	a.z += b.z;
+	a.w += b.w;
+	return a;
+}
+
+inline Vector4 &operator -=(Vector4 &a, const Vector4 &b)
+{
+	a.x -= b.x;
+	a.y -= b.y;
+	a.z -= b.z;
+	a.w -= b.w;
+	return a;
+}
+
+inline Vector4 &operator *=(Vector4 &a, const Vector4 &b)
+{
+	a.x *= b.x;
+	a.y *= b.y;
+	a.z *= b.z;
+	a.w *= b.w;
+	return a;
+}
+
+inline Vector4 &operator /=(Vector4 &a, const Vector4 &b)
+{
+	a.x /= b.x;
+	a.y /= b.y;
+	a.z /= b.z;
+	a.w /= b.w;
+	return a;
+}
+
+inline Vector4 &operator *=(Vector4 &v, float s)
+{
+	v.x *= s;
+	v.y *= s;
+	v.z *= s;
+	v.w *= s;
+	return v;
+}
+
+inline Vector4 &operator /=(Vector4 &v, float s)
+{
+	v.x /= s;
+	v.y /= s;
+	v.z /= s;
+	v.w /= s;
+	return v;
+}
+
+inline bool operator ==(const Vector4 &a, const Vector4 &b)
+{
+	return a.x == b.x && a.y == b.y && a.z == b.z && a.w == b.w;
+}
+
+inline bool operator !=(const Vector4 &a, const Vector4 &b)
+{
+	return !(a == b);
+}
+
+inline float dot(const Vector4 &a, const Vector4 &b)
+{
+	return a.x * b.x + a.y * b.y + a.z * b.z + a.w * b.w;
+}
+
+inline Vector4 cross(const Vector4 &v1, const Vector4 &v2, const Vector4 &v3)
+{
+    /* Calculate intermediate values. */
+    float a = (v2.x * v3.y) - (v2.y * v3.x);
+    float b = (v2.x * v3.z) - (v2.z * v3.x);
+    float c = (v2.x * v3.w) - (v2.w * v3.x);
+    float d = (v2.y * v3.z) - (v2.z * v3.y);
+    float e = (v2.y * v3.w) - (v2.w * v3.y);
+    float f = (v2.z * v3.w) - (v2.w * v3.z);
+
+    /* Calculate the result-vector components. */
+    float x =   (v1.y * f) - (v1.z * e) + (v1.w * d);
+    float y = - (v1.x * f) + (v1.z * c) - (v1.w * b);
+    float z =   (v1.x * e) - (v1.y * c) + (v1.w * a);
+    float w = - (v1.x * d) + (v1.y * b) - (v1.z * a);
+
+    return Vector4(x, y, z, w);
+}
+
+inline float length(const Vector4 &v)
+{
+	return (float)sqrt(v.x * v.x + v.y * v.y + v.z * v.z + v.w * v.w);
+}
+
+inline float length_sq(const Vector4 &v)
+{
+	return v.x * v.x + v.y * v.y + v.z * v.z + v.w * v.w;
+}
+
+inline Vector4 normalize(const Vector4 &v)
+{
+	float len = length(v);
+	if(len == 0.0f) {
+		return v;
+	}
+
+	return Vector4(v.x / len, v.y / len, v.z / len, v.w / len);
+}
+
+inline Vector4 reflect(const Vector4 &v, const Vector4 &n)
+{
+	return v - n * dot(n, v) * 2.0;
+}
+
+inline Vector4 refract(const Vector4 &v, const Vector4 &n, float ior)
+{
+	float ndotv = dot(n, v);
+	float k = 1.0f - ior * ior * (1.0f - ndotv * ndotv);
+	if(k < 0.0f) {
+		return Vector4();
+	}
+	return ior * v - (ior * ndotv + sqrt(k)) * n;
+}
+
+inline Vector4 refract(const Vector4 &v, const Vector4 &n, float from_ior, float to_ior)
+{
+	if(to_ior == 0.0f) to_ior = 1.0f;
+	return refract(v, n, from_ior / to_ior);
+}
+
+inline float distance(const Vector4 &a, const Vector4 &b)
+{
+	return length(a - b);
+}
+
+inline float distance_sq(const Vector4 &a, const Vector4 &b)
+{
+	return length_sq(a - b);
+}
+
+inline Vector4 faceforward(const Vector4 &n, const Vector4 &vi, const Vector4 &ng)
+{
+	return dot(ng, vi) < 0.0f ? n : -n;
+}
+
+inline Vector4 major(const Vector4 &v)
+{
+	int m = major_idx(v);
+	Vector4 res;
+	res[m] = v[m];
+	return res;
+}
+
+inline int major_idx(const Vector4 &v)
+{
+	if(fabs(v.x) >= fabs(v.y) && fabs(v.x) >= fabs(v.z) && fabs(v.x >= v.w)) {
+		return 0;
+	}
+	if(fabs(v.y) >= fabs(v.z) && fabs(v.y) >= fabs(v.w)) {
+		return 1;
+	}
+	if(fabs(v.z) >= fabs(v.w)) {
+		return 2;
+	}
+	return 3;
+}
+
+inline Vector4 proj_axis(const Vector4 &v, const Vector4 &axis)
+{
+	return axis * dot(v, axis);
+}
+
+
+inline Vector4 rotate(const Vector4 &v, const Quaternion &q)
+{
+	return v;	// TODO
+}
+
+inline Vector4 rotate(const Vector4 &v, const Vector4 &axis, float angle)
+{
+	return v;	// TODO
+}
+
+inline Vector4 rotate(const Vector4 &v, const Vector4 &euler)
+{
+	return v;	// TODO
+}