1 files changed, 759 insertions, 0 deletions
diff --git a/intern/cycles/util/util_math.h b/intern/cycles/util/util_math.h
new file mode 100644
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+++ b/intern/cycles/util/util_math.h
@@ -0,0 +1,759 @@
+/*
+ * Copyright 2011, Blender Foundation.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#ifndef __UTIL_MATH_H__
+#define __UTIL_MATH_H__
+
+/* Math
+ *
+ * Basic math functions on scalar and vector types. This header is used by
+ * both the kernel code when compiled as C++, and other C++ non-kernel code. */
+
+#ifndef __KERNEL_OPENCL__
+
+#define _USE_MATH_DEFINES
+
+#include <float.h>
+#include <math.h>
+#include <stdio.h>
+
+#endif
+
+#include "util_types.h"
+
+CCL_NAMESPACE_BEGIN
+
+#define M_PI_F		((float)3.14159265358979323846264338327950288)
+#define M_PI_2_F	((float)1.57079632679489661923132169163975144)
+#define M_PI_4_F	((float)0.785398163397448309615660845819875721)
+#define M_1_PI_F	((float)0.318309886183790671537767526745028724)
+#define M_2_PI_F	((float)0.636619772367581343075535053490057448)
+
+/* Scalar */
+
+#ifdef _WIN32
+
+#define copysignf _copysign
+
+__device_inline float fmaxf(float a, float b)
+{
+	return (a > b)? a: b;
+}
+
+__device_inline float fminf(float a, float b)
+{
+	return (a < b)? a: b;
+}
+
+#endif
+
+#ifndef __KERNEL_OPENCL__
+
+__device_inline int max(int a, int b)
+{
+	return (a > b)? a: b;
+}
+
+__device_inline int min(int a, int b)
+{
+	return (a < b)? a: b;
+}
+
+__device_inline float max(float a, float b)
+{
+	return (a > b)? a: b;
+}
+
+__device_inline float min(float a, float b)
+{
+	return (a < b)? a: b;
+}
+
+#endif
+
+__device_inline float min4(float a, float b, float c, float d)
+{
+	return min(min(min(a, b), c), d);
+}
+
+__device_inline float max4(float a, float b, float c, float d)
+{
+	return max(max(max(a, b), c), d);
+}
+
+#ifndef __KERNEL_OPENCL__
+
+__device_inline int clamp(int a, int mn, int mx)
+{
+	return min(max(a, mn), mx);
+}
+
+__device_inline float clamp(float a, float mn, float mx)
+{
+	return min(max(a, mn), mx);
+}
+
+#endif
+
+__device_inline float signf(float f)
+{
+	return (f < 0.0f)? -1.0f: 1.0f;
+}
+
+__device_inline float nonzerof(float f, float eps)
+{
+	if(fabsf(f) < eps)
+		return signf(f)*eps;
+	else
+		return f;
+}
+
+/* Float2 Vector */
+
+#ifndef __KERNEL_OPENCL__
+
+__device_inline bool is_zero(const float2 a)
+{
+	return (a.x == 0.0f && a.y == 0.0f);
+}
+
+#endif
+
+#ifndef __KERNEL_OPENCL__
+
+__device_inline float average(const float2 a)
+{
+	return (a.x + a.y)*(1.0f/2.0f);
+}
+
+#endif
+
+#ifndef __KERNEL_OPENCL__
+
+__device_inline float2 operator-(const float2 a)
+{
+	float2 r = {-a.x, -a.y};
+	return r;
+}
+
+__device_inline float2 operator*(const float2 a, const float2 b)
+{
+	float2 r = {a.x*b.x, a.y*b.y};
+	return r;
+}
+
+__device_inline float2 operator*(const float2 a, float f)
+{
+	float2 r = {a.x*f, a.y*f};
+	return r;
+}
+
+__device_inline float2 operator*(float f, const float2 a)
+{
+	float2 r = {a.x*f, a.y*f};
+	return r;
+}
+
+__device_inline float2 operator/(float f, const float2 a)
+{
+	float2 r = {f/a.x, f/a.y};
+	return r;
+}
+
+__device_inline float2 operator/(const float2 a, float f)
+{
+	float invf = 1.0f/f;
+	float2 r = {a.x*invf, a.y*invf};
+	return r;
+}
+
+__device_inline float2 operator/(const float2 a, const float2 b)
+{
+	float2 r = {a.x/b.x, a.y/b.y};
+	return r;
+}
+
+__device_inline float2 operator+(const float2 a, const float2 b)
+{
+	float2 r = {a.x+b.x, a.y+b.y};
+	return r;
+}
+
+__device_inline float2 operator-(const float2 a, const float2 b)
+{
+	float2 r = {a.x-b.x, a.y-b.y};
+	return r;
+}
+
+__device_inline float2 operator+=(float2& a, const float2 b)
+{
+	a.x += b.x;
+	a.y += b.y;
+	return a;
+}
+
+__device_inline float2 operator*=(float2& a, const float2 b)
+{
+	a.x *= b.x;
+	a.y *= b.y;
+	return a;
+}
+
+__device_inline float2 operator*=(float2& a, float f)
+{
+	a.x *= f;
+	a.y *= f;
+	return a;
+}
+
+__device_inline float2 operator/=(float2& a, const float2 b)
+{
+	a.x /= b.x;
+	a.y /= b.y;
+	return a;
+}
+
+__device_inline float2 operator/=(float2& a, float f)
+{
+	float invf = 1.0f/f;
+	a.x *= invf;
+	a.y *= invf;
+	return a;
+}
+
+
+__device_inline float dot(const float2 a, const float2 b)
+{
+	return a.x*b.x + a.y*b.y;
+}
+
+__device_inline float cross(const float2 a, const float2 b)
+{
+	return (a.x*b.y - a.y*b.x);
+}
+
+#endif
+
+#ifndef __KERNEL_OPENCL__
+
+__device_inline float len(const float2 a)
+{
+	return sqrtf(dot(a, a));
+}
+
+__device_inline float2 normalize(const float2 a)
+{
+	return a/len(a);
+}
+
+__device_inline float2 normalize_len(const float2 a, float *t)
+{
+	*t = len(a);
+	return a/(*t);
+}
+
+__device_inline bool operator==(const float2 a, const float2 b)
+{
+	return (a.x == b.x && a.y == b.y);
+}
+
+__device_inline bool operator!=(const float2 a, const float2 b)
+{
+	return !(a == b);
+}
+
+__device_inline float2 min(float2 a, float2 b)
+{
+	float2 r = {min(a.x, b.x), min(a.y, b.y)};
+	return r;
+}
+
+__device_inline float2 max(float2 a, float2 b)
+{
+	float2 r = {max(a.x, b.x), max(a.y, b.y)};
+	return r;
+}
+
+__device_inline float2 clamp(float2 a, float2 mn, float2 mx)
+{
+	return min(max(a, mn), mx);
+}
+
+__device_inline float2 fabs(float2 a)
+{
+	return make_float2(fabsf(a.x), fabsf(a.y));
+}
+
+__device_inline float2 as_float2(const float4 a)
+{
+	return make_float2(a.x, a.y);
+}
+
+#endif
+
+#ifndef __KERNEL_GPU__
+
+__device_inline void print_float2(const char *label, const float2& a)
+{
+	printf("%s: %.8f %.8f\n", label, a.x, a.y);
+}
+
+#endif
+
+#ifndef __KERNEL_OPENCL__
+
+__device_inline float2 interp(float2 a, float2 b, float t)
+{
+	return a + t*(b - a);
+}
+
+#endif
+
+/* Float3 Vector */
+
+__device_inline bool is_zero(const float3 a)
+{
+	return (a.x == 0.0f && a.y == 0.0f && a.z == 0.0f);
+}
+
+__device_inline float average(const float3 a)
+{
+	return (a.x + a.y + a.z)*(1.0f/3.0f);
+}
+
+#ifndef __KERNEL_OPENCL__
+
+__device_inline float3 operator-(const float3 a)
+{
+	float3 r = {-a.x, -a.y, -a.z};
+	return r;
+}
+
+__device_inline float3 operator*(const float3 a, const float3 b)
+{
+	float3 r = {a.x*b.x, a.y*b.y, a.z*b.z};
+	return r;
+}
+
+__device_inline float3 operator*(const float3 a, float f)
+{
+	float3 r = {a.x*f, a.y*f, a.z*f};
+	return r;
+}
+
+__device_inline float3 operator*(float f, const float3 a)
+{
+	float3 r = {a.x*f, a.y*f, a.z*f};
+	return r;
+}
+
+__device_inline float3 operator/(float f, const float3 a)
+{
+	float3 r = {f/a.x, f/a.y, f/a.z};
+	return r;
+}
+
+__device_inline float3 operator/(const float3 a, float f)
+{
+	float invf = 1.0f/f;
+	float3 r = {a.x*invf, a.y*invf, a.z*invf};
+	return r;
+}
+
+__device_inline float3 operator/(const float3 a, const float3 b)
+{
+	float3 r = {a.x/b.x, a.y/b.y, a.z/b.z};
+	return r;
+}
+
+__device_inline float3 operator+(const float3 a, const float3 b)
+{
+	float3 r = {a.x+b.x, a.y+b.y, a.z+b.z};
+	return r;
+}
+
+__device_inline float3 operator-(const float3 a, const float3 b)
+{
+	float3 r = {a.x-b.x, a.y-b.y, a.z-b.z};
+	return r;
+}
+
+__device_inline float3 operator+=(float3& a, const float3 b)
+{
+	a.x += b.x;
+	a.y += b.y;
+	a.z += b.z;
+	return a;
+}
+
+__device_inline float3 operator*=(float3& a, const float3 b)
+{
+	a.x *= b.x;
+	a.y *= b.y;
+	a.z *= b.z;
+	return a;
+}
+
+__device_inline float3 operator*=(float3& a, float f)
+{
+	a.x *= f;
+	a.y *= f;
+	a.z *= f;
+	return a;
+}
+
+__device_inline float3 operator/=(float3& a, const float3 b)
+{
+	a.x /= b.x;
+	a.y /= b.y;
+	a.z /= b.z;
+	return a;
+}
+
+__device_inline float3 operator/=(float3& a, float f)
+{
+	float invf = 1.0f/f;
+	a.x *= invf;
+	a.y *= invf;
+	a.z *= invf;
+	return a;
+}
+
+__device_inline float dot(const float3 a, const float3 b)
+{
+	return a.x*b.x + a.y*b.y + a.z*b.z;
+}
+
+__device_inline float3 cross(const float3 a, const float3 b)
+{
+	float3 r = {a.y*b.z - a.z*b.y, a.z*b.x - a.x*b.z, a.x*b.y - a.y*b.x};
+	return r;
+}
+
+#endif
+
+__device_inline float len(const float3 a)
+{
+	return sqrtf(dot(a, a));
+}
+
+#ifndef __KERNEL_OPENCL__
+
+__device_inline float3 normalize(const float3 a)
+{
+	return a/len(a);
+}
+
+#endif
+
+__device_inline float3 normalize_len(const float3 a, float *t)
+{
+	*t = len(a);
+	return a/(*t);
+}
+
+#ifndef __KERNEL_OPENCL__
+
+__device_inline bool operator==(const float3 a, const float3 b)
+{
+	return (a.x == b.x && a.y == b.y && a.z == b.z);
+}
+
+__device_inline bool operator!=(const float3 a, const float3 b)
+{
+	return !(a == b);
+}
+
+__device_inline float3 min(float3 a, float3 b)
+{
+	float3 r = {min(a.x, b.x), min(a.y, b.y), min(a.z, b.z)};
+	return r;
+}
+
+__device_inline float3 max(float3 a, float3 b)
+{
+	float3 r = {max(a.x, b.x), max(a.y, b.y), max(a.z, b.z)};
+	return r;
+}
+
+__device_inline float3 clamp(float3 a, float3 mn, float3 mx)
+{
+	return min(max(a, mn), mx);
+}
+
+__device_inline float3 fabs(float3 a)
+{
+	return make_float3(fabsf(a.x), fabsf(a.y), fabsf(a.z));
+}
+
+__device_inline float3 as_float3(const float4& a)
+{
+	return make_float3(a.x, a.y, a.z);
+}
+
+#endif
+
+#ifndef __KERNEL_GPU__
+
+__device_inline void print_float3(const char *label, const float3& a)
+{
+	printf("%s: %.8f %.8f %.8f\n", label, a.x, a.y, a.z);
+}
+
+#endif
+
+__device_inline float3 interp(float3 a, float3 b, float t)
+{
+	return a + t*(b - a);
+}
+
+/* Float4 Vector */
+
+#ifndef __KERNEL_OPENCL__
+
+__device_inline bool is_zero(const float4& a)
+{
+	return (a.x == 0.0f && a.y == 0.0f && a.z == 0.0f && a.w == 0.0f);
+}
+
+__device_inline float average(const float4& a)
+{
+	return (a.x + a.y + a.z + a.w)*(1.0f/4.0f);
+}
+
+__device_inline float4 operator-(const float4& a)
+{
+	float4 r = {-a.x, -a.y, -a.z, -a.w};
+	return r;
+}
+
+__device_inline float4 operator*(const float4& a, const float4& b)
+{
+	float4 r = {a.x*b.x, a.y*b.y, a.z*b.z, a.w*b.w};
+	return r;
+}
+
+__device_inline float4 operator*(const float4& a, float f)
+{
+	float4 r = {a.x*f, a.y*f, a.z*f, a.w*f};
+	return r;
+}
+
+__device_inline float4 operator*(float f, const float4& a)
+{
+	float4 r = {a.x*f, a.y*f, a.z*f, a.w*f};
+	return r;
+}
+
+__device_inline float4 operator/(const float4& a, float f)
+{
+	float invf = 1.0f/f;
+	float4 r = {a.x*invf, a.y*invf, a.z*invf, a.w*invf};
+	return r;
+}
+
+__device_inline float4 operator/(const float4& a, const float4& b)
+{
+	float4 r = {a.x/b.x, a.y/b.y, a.z/b.z, a.w/b.w};
+	return r;
+}
+
+__device_inline float4 operator+(const float4& a, const float4& b)
+{
+	float4 r = {a.x+b.x, a.y+b.y, a.z+b.z, a.w+b.w};
+	return r;
+}
+
+__device_inline float4 operator-(const float4& a, const float4& b)
+{
+	float4 r = {a.x-b.x, a.y-b.y, a.z-b.z, a.w-b.w};
+	return r;
+}
+
+__device_inline float4 operator+=(float4& a, const float4& b)
+{
+	a.x += b.x;
+	a.y += b.y;
+	a.z += b.z;
+	a.w += b.w;
+	return a;
+}
+
+__device_inline float4 operator*=(float4& a, const float4& b)
+{
+	a.x *= b.x;
+	a.y *= b.y;
+	a.z *= b.z;
+	a.w *= b.w;
+	return a;
+}
+
+__device_inline float4 operator/=(float4& a, float f)
+{
+	float invf = 1.0f/f;
+	a.x *= invf;
+	a.y *= invf;
+	a.z *= invf;
+	a.w *= invf;
+	return a;
+}
+
+__device_inline float dot(const float4& a, const float4& b)
+{
+	return a.x*b.x + a.y*b.y + a.z*b.z + a.w*b.w;
+}
+
+__device_inline float4 cross(const float4& a, const float4& b)
+{
+	float4 r = {a.y*b.z - a.z*b.y, a.z*b.x - a.x*b.z, a.x*b.y - a.y*b.x, 0.0f};
+	return r;
+}
+
+__device_inline float4 min(float4 a, float4 b)
+{
+	return make_float4(min(a.x, b.x), min(a.y, b.y), min(a.z, b.z), min(a.w, b.w));
+}
+
+__device_inline float4 max(float4 a, float4 b)
+{
+	return make_float4(max(a.x, b.x), max(a.y, b.y), max(a.z, b.z), max(a.w, b.w));
+}
+
+#endif
+
+#ifndef __KERNEL_GPU__
+
+__device_inline void print_float4(const char *label, const float4& a)
+{
+	printf("%s: %.8f %.8f %.8f %.8f\n", label, a.x, a.y, a.z, a.w);
+}
+
+#endif
+
+/* Int3 */
+
+#ifndef __KERNEL_OPENCL__
+
+__device_inline int3 max(int3 a, int3 b)
+{
+	int3 r = {max(a.x, b.x), max(a.y, b.y), max(a.z, b.z)};
+	return r;
+}
+
+__device_inline int3 clamp(const int3& a, int mn, int mx)
+{
+	int3 r = {clamp(a.x, mn, mx), clamp(a.y, mn, mx), clamp(a.z, mn, mx)};
+	return r;
+}
+
+__device_inline int3 clamp(const int3& a, int3& mn, int mx)
+{
+	int3 r = {clamp(a.x, mn.x, mx), clamp(a.y, mn.y, mx), clamp(a.z, mn.z, mx)};
+	return r;
+}
+
+#endif
+
+#ifndef __KERNEL_GPU__
+
+__device_inline void print_int3(const char *label, const int3& a)
+{
+	printf("%s: %d %d %d\n", label, a.x, a.y, a.z);
+}
+
+#endif
+
+/* Int4 */
+
+#ifndef __KERNEL_OPENCL__
+
+__device_inline int4 operator>=(float4 a, float4 b)
+{
+	return make_int4(a.x >= b.x, a.y >= b.y, a.z >= b.z, a.w >= b.w);
+}
+
+#endif
+
+#ifndef __KERNEL_GPU__
+
+__device_inline void print_int4(const char *label, const int4& a)
+{
+	printf("%s: %d %d %d %d\n", label, a.x, a.y, a.z, a.w);
+}
+
+#endif
+
+/* Int/Float conversion */
+
+#ifndef __KERNEL_OPENCL__
+
+__device_inline unsigned int as_uint(float f)
+{
+	union { unsigned int i; float f; } u;
+	u.f = f;
+	return u.i;
+}
+
+__device_inline int __float_as_int(float f)
+{
+	union { int i; float f; } u;
+	u.f = f;
+	return u.i;
+}
+
+__device_inline float __int_as_float(int i)
+{
+	union { int i; float f; } u;
+	u.i = i;
+	return u.f;
+}
+
+__device_inline uint __float_as_uint(float f)
+{
+	union { uint i; float f; } u;
+	u.f = f;
+	return u.i;
+}
+
+__device_inline float __uint_as_float(uint i)
+{
+	union { uint i; float f; } u;
+	u.i = i;
+	return u.f;
+}
+
+/* Interpolation */
+
+template<class A, class B> __device_inline A lerp(const A& a, const A& b, const B& t)
+{
+	return (A)(a * ((B)1 - t) + b * t);
+}
+
+/* Triangle */
+
+__device_inline float triangle_area(const float3 v1, const float3 v2, const float3 v3)
+{
+	return len(cross(v3 - v2, v1 - v2))*0.5f;
+}
+
+#endif
+
+CCL_NAMESPACE_END
+
+#endif /* __UTIL_MATH_H__ */
+