texture.cpp File Reference

#include "stdafx.h"
#include "texture.h"
#include "shape.h"

Go to the source code of this file.

Defines
#define	NOISE_PERM_SIZE   256
Functions
float	SmoothStep (float min, float max, float value)
float	Grad (int x, int y, int z, float dx, float dy, float dz)
float	NoiseWeight (float t)
float	Noise (float x, float y, float z)
float	Noise (const Point &P)
float	FBm (const Point &P, const Vector &dpdx, const Vector &dpdy, float omega, int maxOctaves)
float	Turbulence (const Point &P, const Vector &dpdx, const Vector &dpdy, float omega, int maxOctaves)
float	Lanczos (float x, float tau)
Variables
static int	NoisePerm [2 *NOISE_PERM_SIZE]

---

Define Documentation

#define NOISE_PERM_SIZE   256

Definition at line 43 of file texture.cpp.

Referenced by Noise().

---

Function Documentation

float FBm	(	const Point &	P,
		const Vector &	dpdx,
		const Vector &	dpdy,
		float	omega,
		int	maxOctaves
	)

Definition at line 210 of file texture.cpp.

References Floor2Int(), lambda(), Vector::LengthSquared(), Log2(), Noise(), and SmoothStep().

Referenced by WindyTexture< T >::Evaluate(), MarbleTexture::Evaluate(), and FBmTexture< T >::Evaluate().

float Grad	(	int	x,
		int	y,
		int	z,
		float	dx,
		float	dy,
		float	dz
	)			[inline]

Definition at line 194 of file texture.cpp.

References NoisePerm.

Referenced by Noise().

float Lanczos	(	float	x,
		float	tau
	)

Definition at line 253 of file texture.cpp.

References M_PI.

Referenced by MIPMap< RGBSpectrum >::resampleWeights().

float Noise

(

const Point &

P

)

Definition at line 193 of file texture.cpp.

References Noise(), Point::x, Point::y, and Point::z.

float Noise	(	float	x,
		float	y,
		float	z
	)

Definition at line 163 of file texture.cpp.

References Floor2Int(), Grad(), Lerp(), NOISE_PERM_SIZE, and NoiseWeight().

Referenced by DotsTexture< T >::Evaluate(), FBm(), Noise(), and Turbulence().

float NoiseWeight

(

float

t

)

[inline]

Definition at line 203 of file texture.cpp.

Referenced by Noise().

float SmoothStep	(	float	min,
		float	max,
		float	value
	)			[inline]

Definition at line 31 of file texture.cpp.

References Clamp().

Referenced by FBm(), and Turbulence().

float Turbulence	(	const Point &	P,
		const Vector &	dpdx,
		const Vector &	dpdy,
		float	omega,
		int	maxOctaves
	)

Definition at line 230 of file texture.cpp.

References Floor2Int(), lambda(), Vector::LengthSquared(), Log2(), Noise(), and SmoothStep().

Referenced by WrinkledTexture< T >::Evaluate().

---

Variable Documentation

int NoisePerm[2 *NOISE_PERM_SIZE] [static]

Initial value:

 {
    151, 160, 137, 91, 90, 15, 131, 13, 201, 95, 96,
    53, 194, 233, 7, 225, 140, 36, 103, 30, 69, 142,
    
    8, 99, 37, 240, 21, 10, 23,
       190,  6, 148, 247, 120, 234, 75, 0, 26, 197, 62, 94, 252, 219, 203, 117, 35, 11, 32, 57, 177, 33,
       88, 237, 149, 56, 87, 174, 20, 125, 136, 171, 168,  68, 175, 74, 165, 71, 134, 139, 48, 27, 166,
       77, 146, 158, 231, 83, 111, 229, 122, 60, 211, 133, 230, 220, 105, 92, 41, 55, 46, 245, 40, 244,
       102, 143, 54,  65, 25, 63, 161,  1, 216, 80, 73, 209, 76, 132, 187, 208,  89, 18, 169, 200, 196,
       135, 130, 116, 188, 159, 86, 164, 100, 109, 198, 173, 186,  3, 64, 52, 217, 226, 250, 124, 123,
       5, 202, 38, 147, 118, 126, 255, 82, 85, 212, 207, 206, 59, 227, 47, 16, 58, 17, 182, 189, 28, 42,
       223, 183, 170, 213, 119, 248, 152,  2, 44, 154, 163,  70, 221, 153, 101, 155, 167,  43, 172, 9,
       129, 22, 39, 253,  19, 98, 108, 110, 79, 113, 224, 232, 178, 185,  112, 104, 218, 246, 97, 228,
       251, 34, 242, 193, 238, 210, 144, 12, 191, 179, 162, 241,  81, 51, 145, 235, 249, 14, 239, 107,
       49, 192, 214,  31, 181, 199, 106, 157, 184,  84, 204, 176, 115, 121, 50, 45, 127,  4, 150, 254,
       138, 236, 205, 93, 222, 114, 67, 29, 24, 72, 243, 141, 128, 195, 78, 66, 215, 61, 156, 180,
       151, 160, 137, 91, 90, 15,
       131, 13, 201, 95, 96, 53, 194, 233, 7, 225, 140, 36, 103, 30, 69, 142, 8, 99, 37, 240, 21, 10, 23,
       190,  6, 148, 247, 120, 234, 75, 0, 26, 197, 62, 94, 252, 219, 203, 117, 35, 11, 32, 57, 177, 33,
       88, 237, 149, 56, 87, 174, 20, 125, 136, 171, 168,  68, 175, 74, 165, 71, 134, 139, 48, 27, 166,
       77, 146, 158, 231, 83, 111, 229, 122, 60, 211, 133, 230, 220, 105, 92, 41, 55, 46, 245, 40, 244,
       102, 143, 54,  65, 25, 63, 161,  1, 216, 80, 73, 209, 76, 132, 187, 208,  89, 18, 169, 200, 196,
       135, 130, 116, 188, 159, 86, 164, 100, 109, 198, 173, 186,  3, 64, 52, 217, 226, 250, 124, 123,
       5, 202, 38, 147, 118, 126, 255, 82, 85, 212, 207, 206, 59, 227, 47, 16, 58, 17, 182, 189, 28, 42,
       223, 183, 170, 213, 119, 248, 152,  2, 44, 154, 163,  70, 221, 153, 101, 155, 167,  43, 172, 9,
       129, 22, 39, 253,  19, 98, 108, 110, 79, 113, 224, 232, 178, 185,  112, 104, 218, 246, 97, 228,
       251, 34, 242, 193, 238, 210, 144, 12, 191, 179, 162, 241,  81, 51, 145, 235, 249, 14, 239, 107,
       49, 192, 214,  31, 181, 199, 106, 157, 184,  84, 204, 176, 115, 121, 50, 45, 127,  4, 150, 254,
       138, 236, 205, 93, 222, 114, 67, 29, 24, 72, 243, 141, 128, 195, 78, 66, 215, 61, 156, 180
}

Definition at line 44 of file texture.cpp.

Referenced by Grad().