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-/**
- * \file macros.h
- * A collection of useful macros.
- */
-
-/*
- * Mesa 3-D graphics library
- * Version: 6.0
- *
- * Copyright (C) 1999-2004 Brian Paul All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included
- * in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
- * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- */
-
-
-#ifndef MACROS_H
-#define MACROS_H
-
-#include "imports.h"
-
-
-/**
- * \name Integer / float conversion for colors, normals, etc.
- */
-/*@{*/
-
-/** Convert GLubyte in [0,255] to GLfloat in [0.0,1.0] */
-extern GLfloat _mesa_ubyte_to_float_color_tab[256];
-#define UBYTE_TO_FLOAT(u) _mesa_ubyte_to_float_color_tab[(unsigned int)(u)]
-
-/** Convert GLfloat in [0.0,1.0] to GLubyte in [0,255] */
-#define FLOAT_TO_UBYTE(X) ((GLubyte) (GLint) ((X) * 255.0F))
-
-
-/** Convert GLbyte in [-128,127] to GLfloat in [-1.0,1.0] */
-#define BYTE_TO_FLOAT(B) ((2.0F * (B) + 1.0F) * (1.0F/255.0F))
-
-/** Convert GLfloat in [-1.0,1.0] to GLbyte in [-128,127] */
-#define FLOAT_TO_BYTE(X) ( (((GLint) (255.0F * (X))) - 1) / 2 )
-
-
-/** Convert GLushort in [0,65536] to GLfloat in [0.0,1.0] */
-#define USHORT_TO_FLOAT(S) ((GLfloat) (S) * (1.0F / 65535.0F))
-
-/** Convert GLshort in [-32768,32767] to GLfloat in [-1.0,1.0] */
-#define SHORT_TO_FLOAT(S) ((2.0F * (S) + 1.0F) * (1.0F/65535.0F))
-
-/** Convert GLfloat in [0.0,1.0] to GLshort in [-32768,32767] */
-#define FLOAT_TO_SHORT(X) ( (((GLint) (65535.0F * (X))) - 1) / 2 )
-
-
-/** Convert GLuint in [0,4294967295] to GLfloat in [0.0,1.0] */
-#define UINT_TO_FLOAT(U) ((GLfloat) (U) * (1.0F / 4294967295.0F))
-
-/** Convert GLfloat in [0.0,1.0] to GLuint in [0,4294967295] */
-#define FLOAT_TO_UINT(X) ((GLuint) ((X) * 4294967295.0))
-
-
-/** Convert GLint in [-2147483648,2147483647] to GLfloat in [-1.0,1.0] */
-#define INT_TO_FLOAT(I) ((2.0F * (I) + 1.0F) * (1.0F/4294967294.0F))
-
-/** Convert GLfloat in [-1.0,1.0] to GLint in [-2147483648,2147483647] */
-/* causes overflow:
-#define FLOAT_TO_INT(X) ( (((GLint) (4294967294.0F * (X))) - 1) / 2 )
-*/
-/* a close approximation: */
-#define FLOAT_TO_INT(X) ( (GLint) (2147483647.0 * (X)) )
-
-
-#define BYTE_TO_UBYTE(b) ((GLubyte) ((b) < 0 ? 0 : (GLubyte) (b)))
-#define SHORT_TO_UBYTE(s) ((GLubyte) ((s) < 0 ? 0 : (GLubyte) ((s) >> 7)))
-#define USHORT_TO_UBYTE(s) ((GLubyte) ((s) >> 8))
-#define INT_TO_UBYTE(i) ((GLubyte) ((i) < 0 ? 0 : (GLubyte) ((i) >> 23)))
-#define UINT_TO_UBYTE(i) ((GLubyte) ((i) >> 24))
-
-
-#define BYTE_TO_USHORT(b) ((b) < 0 ? 0 : ((GLushort) (((b) * 65535) / 255)))
-#define UBYTE_TO_USHORT(b) (((GLushort) (b) << 8) | (GLushort) (b))
-#define SHORT_TO_USHORT(s) ((s) < 0 ? 0 : ((GLushort) (((s) * 65535 / 32767))))
-#define INT_TO_USHORT(i) ((i) < 0 ? 0 : ((GLushort) ((i) >> 15)))
-#define UINT_TO_USHORT(i) ((i) < 0 ? 0 : ((GLushort) ((i) >> 16)))
-#define UNCLAMPED_FLOAT_TO_USHORT(us, f) \
- us = ( (GLushort) IROUND( CLAMP((f), 0.0, 1.0) * 65535.0F) )
-#define CLAMPED_FLOAT_TO_USHORT(us, f) \
- us = ( (GLushort) IROUND( (f) * 65535.0F) )
-
-/*@}*/
-
-
-/** Stepping a GLfloat pointer by a byte stride */
-#define STRIDE_F(p, i) (p = (GLfloat *)((GLubyte *)p + i))
-/** Stepping a GLuint pointer by a byte stride */
-#define STRIDE_UI(p, i) (p = (GLuint *)((GLubyte *)p + i))
-/** Stepping a GLubyte[4] pointer by a byte stride */
-#define STRIDE_4UB(p, i) (p = (GLubyte (*)[4])((GLubyte *)p + i))
-/** Stepping a GLfloat[4] pointer by a byte stride */
-#define STRIDE_4F(p, i) (p = (GLfloat (*)[4])((GLubyte *)p + i))
-/** Stepping a GLchan[4] pointer by a byte stride */
-#define STRIDE_4CHAN(p, i) (p = (GLchan (*)[4])((GLubyte *)p + i))
-/** Stepping a GLchan pointer by a byte stride */
-#define STRIDE_CHAN(p, i) (p = (GLchan *)((GLubyte *)p + i))
-/** Stepping a \p t pointer by a byte stride */
-#define STRIDE_T(p, t, i) (p = (t)((GLubyte *)p + i))
-
-
-/**********************************************************************/
-/** \name 4-element vector operations */
-/*@{*/
-
-/** Zero */
-#define ZERO_4V( DST ) (DST)[0] = (DST)[1] = (DST)[2] = (DST)[3] = 0
-
-/** Test for equality */
-#define TEST_EQ_4V(a,b) ((a)[0] == (b)[0] && \
- (a)[1] == (b)[1] && \
- (a)[2] == (b)[2] && \
- (a)[3] == (b)[3])
-
-/** Test for equality (unsigned bytes) */
-#if defined(__i386__)
-#define TEST_EQ_4UBV(DST, SRC) *((GLuint*)(DST)) == *((GLuint*)(SRC))
-#else
-#define TEST_EQ_4UBV(DST, SRC) TEST_EQ_4V(DST, SRC)
-#endif
-
-/** Copy a 4-element vector */
-#define COPY_4V( DST, SRC ) \
-do { \
- (DST)[0] = (SRC)[0]; \
- (DST)[1] = (SRC)[1]; \
- (DST)[2] = (SRC)[2]; \
- (DST)[3] = (SRC)[3]; \
-} while (0)
-
-/** Copy a 4-element vector with cast */
-#define COPY_4V_CAST( DST, SRC, CAST ) \
-do { \
- (DST)[0] = (CAST)(SRC)[0]; \
- (DST)[1] = (CAST)(SRC)[1]; \
- (DST)[2] = (CAST)(SRC)[2]; \
- (DST)[3] = (CAST)(SRC)[3]; \
-} while (0)
-
-/** Copy a 4-element unsigned byte vector */
-#if defined(__i386__)
-#define COPY_4UBV(DST, SRC) \
-do { \
- *((GLuint*)(DST)) = *((GLuint*)(SRC)); \
-} while (0)
-#else
-/* The GLuint cast might fail if DST or SRC are not dword-aligned (RISC) */
-#define COPY_4UBV(DST, SRC) \
-do { \
- (DST)[0] = (SRC)[0]; \
- (DST)[1] = (SRC)[1]; \
- (DST)[2] = (SRC)[2]; \
- (DST)[3] = (SRC)[3]; \
-} while (0)
-#endif
-
-/** Copy a 4-element float vector (Use COPY_FLOAT to avoid loading FPU) */
-#define COPY_4FV( DST, SRC ) \
-do { \
- COPY_FLOAT((DST)[0], (SRC)[0]); \
- COPY_FLOAT((DST)[1], (SRC)[1]); \
- COPY_FLOAT((DST)[2], (SRC)[2]); \
- COPY_FLOAT((DST)[3], (SRC)[3]); \
-} while (0)
-
-
-/** Copy \p SZ elements into a 4-element vector */
-#define COPY_SZ_4V(DST, SZ, SRC) \
-do { \
- switch (SZ) { \
- case 4: (DST)[3] = (SRC)[3]; \
- case 3: (DST)[2] = (SRC)[2]; \
- case 2: (DST)[1] = (SRC)[1]; \
- case 1: (DST)[0] = (SRC)[0]; \
- } \
-} while(0)
-
-/** Copy \p SZ elements into a homegeneous (4-element) vector, giving
- * default values to the remaining */
-#define COPY_CLEAN_4V(DST, SZ, SRC) \
-do { \
- ASSIGN_4V( DST, 0, 0, 0, 1 ); \
- COPY_SZ_4V( DST, SZ, SRC ); \
-} while (0)
-
-/** Subtraction */
-#define SUB_4V( DST, SRCA, SRCB ) \
-do { \
- (DST)[0] = (SRCA)[0] - (SRCB)[0]; \
- (DST)[1] = (SRCA)[1] - (SRCB)[1]; \
- (DST)[2] = (SRCA)[2] - (SRCB)[2]; \
- (DST)[3] = (SRCA)[3] - (SRCB)[3]; \
-} while (0)
-
-/** Addition */
-#define ADD_4V( DST, SRCA, SRCB ) \
-do { \
- (DST)[0] = (SRCA)[0] + (SRCB)[0]; \
- (DST)[1] = (SRCA)[1] + (SRCB)[1]; \
- (DST)[2] = (SRCA)[2] + (SRCB)[2]; \
- (DST)[3] = (SRCA)[3] + (SRCB)[3]; \
-} while (0)
-
-/** Element-wise multiplication */
-#define SCALE_4V( DST, SRCA, SRCB ) \
-do { \
- (DST)[0] = (SRCA)[0] * (SRCB)[0]; \
- (DST)[1] = (SRCA)[1] * (SRCB)[1]; \
- (DST)[2] = (SRCA)[2] * (SRCB)[2]; \
- (DST)[3] = (SRCA)[3] * (SRCB)[3]; \
-} while (0)
-
-/** In-place addition */
-#define ACC_4V( DST, SRC ) \
-do { \
- (DST)[0] += (SRC)[0]; \
- (DST)[1] += (SRC)[1]; \
- (DST)[2] += (SRC)[2]; \
- (DST)[3] += (SRC)[3]; \
-} while (0)
-
-/** Element-wise multiplication and addition */
-#define ACC_SCALE_4V( DST, SRCA, SRCB ) \
-do { \
- (DST)[0] += (SRCA)[0] * (SRCB)[0]; \
- (DST)[1] += (SRCA)[1] * (SRCB)[1]; \
- (DST)[2] += (SRCA)[2] * (SRCB)[2]; \
- (DST)[3] += (SRCA)[3] * (SRCB)[3]; \
-} while (0)
-
-/** In-place scalar multiplication and addition */
-#define ACC_SCALE_SCALAR_4V( DST, S, SRCB ) \
-do { \
- (DST)[0] += S * (SRCB)[0]; \
- (DST)[1] += S * (SRCB)[1]; \
- (DST)[2] += S * (SRCB)[2]; \
- (DST)[3] += S * (SRCB)[3]; \
-} while (0)
-
-/** Scalar multiplication */
-#define SCALE_SCALAR_4V( DST, S, SRCB ) \
-do { \
- (DST)[0] = S * (SRCB)[0]; \
- (DST)[1] = S * (SRCB)[1]; \
- (DST)[2] = S * (SRCB)[2]; \
- (DST)[3] = S * (SRCB)[3]; \
-} while (0)
-
-/** In-place scalar multiplication */
-#define SELF_SCALE_SCALAR_4V( DST, S ) \
-do { \
- (DST)[0] *= S; \
- (DST)[1] *= S; \
- (DST)[2] *= S; \
- (DST)[3] *= S; \
-} while (0)
-
-/** Assignment */
-#define ASSIGN_4V( V, V0, V1, V2, V3 ) \
-do { \
- V[0] = V0; \
- V[1] = V1; \
- V[2] = V2; \
- V[3] = V3; \
-} while(0)
-
-/*@}*/
-
-
-/**********************************************************************/
-/** \name 3-element vector operations*/
-/*@{*/
-
-/** Zero */
-#define ZERO_3V( DST ) (DST)[0] = (DST)[1] = (DST)[2] = 0
-
-/** Test for equality */
-#define TEST_EQ_3V(a,b) \
- ((a)[0] == (b)[0] && \
- (a)[1] == (b)[1] && \
- (a)[2] == (b)[2])
-
-/** Copy a 3-element vector */
-#define COPY_3V( DST, SRC ) \
-do { \
- (DST)[0] = (SRC)[0]; \
- (DST)[1] = (SRC)[1]; \
- (DST)[2] = (SRC)[2]; \
-} while (0)
-
-/** Copy a 3-element vector with cast */
-#define COPY_3V_CAST( DST, SRC, CAST ) \
-do { \
- (DST)[0] = (CAST)(SRC)[0]; \
- (DST)[1] = (CAST)(SRC)[1]; \
- (DST)[2] = (CAST)(SRC)[2]; \
-} while (0)
-
-/** Copy a 3-element float vector */
-#define COPY_3FV( DST, SRC ) \
-do { \
- const GLfloat *_tmp = (SRC); \
- (DST)[0] = _tmp[0]; \
- (DST)[1] = _tmp[1]; \
- (DST)[2] = _tmp[2]; \
-} while (0)
-
-/** Subtraction */
-#define SUB_3V( DST, SRCA, SRCB ) \
-do { \
- (DST)[0] = (SRCA)[0] - (SRCB)[0]; \
- (DST)[1] = (SRCA)[1] - (SRCB)[1]; \
- (DST)[2] = (SRCA)[2] - (SRCB)[2]; \
-} while (0)
-
-/** Addition */
-#define ADD_3V( DST, SRCA, SRCB ) \
-do { \
- (DST)[0] = (SRCA)[0] + (SRCB)[0]; \
- (DST)[1] = (SRCA)[1] + (SRCB)[1]; \
- (DST)[2] = (SRCA)[2] + (SRCB)[2]; \
-} while (0)
-
-/** In-place scalar multiplication */
-#define SCALE_3V( DST, SRCA, SRCB ) \
-do { \
- (DST)[0] = (SRCA)[0] * (SRCB)[0]; \
- (DST)[1] = (SRCA)[1] * (SRCB)[1]; \
- (DST)[2] = (SRCA)[2] * (SRCB)[2]; \
-} while (0)
-
-/** In-place element-wise multiplication */
-#define SELF_SCALE_3V( DST, SRC ) \
-do { \
- (DST)[0] *= (SRC)[0]; \
- (DST)[1] *= (SRC)[1]; \
- (DST)[2] *= (SRC)[2]; \
-} while (0)
-
-/** In-place addition */
-#define ACC_3V( DST, SRC ) \
-do { \
- (DST)[0] += (SRC)[0]; \
- (DST)[1] += (SRC)[1]; \
- (DST)[2] += (SRC)[2]; \
-} while (0)
-
-/** Element-wise multiplication and addition */
-#define ACC_SCALE_3V( DST, SRCA, SRCB ) \
-do { \
- (DST)[0] += (SRCA)[0] * (SRCB)[0]; \
- (DST)[1] += (SRCA)[1] * (SRCB)[1]; \
- (DST)[2] += (SRCA)[2] * (SRCB)[2]; \
-} while (0)
-
-/** Scalar multiplication */
-#define SCALE_SCALAR_3V( DST, S, SRCB ) \
-do { \
- (DST)[0] = S * (SRCB)[0]; \
- (DST)[1] = S * (SRCB)[1]; \
- (DST)[2] = S * (SRCB)[2]; \
-} while (0)
-
-/** In-place scalar multiplication and addition */
-#define ACC_SCALE_SCALAR_3V( DST, S, SRCB ) \
-do { \
- (DST)[0] += S * (SRCB)[0]; \
- (DST)[1] += S * (SRCB)[1]; \
- (DST)[2] += S * (SRCB)[2]; \
-} while (0)
-
-/** In-place scalar multiplication */
-#define SELF_SCALE_SCALAR_3V( DST, S ) \
-do { \
- (DST)[0] *= S; \
- (DST)[1] *= S; \
- (DST)[2] *= S; \
-} while (0)
-
-/** In-place scalar addition */
-#define ACC_SCALAR_3V( DST, S ) \
-do { \
- (DST)[0] += S; \
- (DST)[1] += S; \
- (DST)[2] += S; \
-} while (0)
-
-/** Assignment */
-#define ASSIGN_3V( V, V0, V1, V2 ) \
-do { \
- V[0] = V0; \
- V[1] = V1; \
- V[2] = V2; \
-} while(0)
-
-/*@}*/
-
-
-/**********************************************************************/
-/** \name 2-element vector operations*/
-/*@{*/
-
-/** Zero */
-#define ZERO_2V( DST ) (DST)[0] = (DST)[1] = 0
-
-/** Copy a 2-element vector */
-#define COPY_2V( DST, SRC ) \
-do { \
- (DST)[0] = (SRC)[0]; \
- (DST)[1] = (SRC)[1]; \
-} while (0)
-
-/** Copy a 2-element vector with cast */
-#define COPY_2V_CAST( DST, SRC, CAST ) \
-do { \
- (DST)[0] = (CAST)(SRC)[0]; \
- (DST)[1] = (CAST)(SRC)[1]; \
-} while (0)
-
-/** Copy a 2-element float vector */
-#define COPY_2FV( DST, SRC ) \
-do { \
- const GLfloat *_tmp = (SRC); \
- (DST)[0] = _tmp[0]; \
- (DST)[1] = _tmp[1]; \
-} while (0)
-
-/** Subtraction */
-#define SUB_2V( DST, SRCA, SRCB ) \
-do { \
- (DST)[0] = (SRCA)[0] - (SRCB)[0]; \
- (DST)[1] = (SRCA)[1] - (SRCB)[1]; \
-} while (0)
-
-/** Addition */
-#define ADD_2V( DST, SRCA, SRCB ) \
-do { \
- (DST)[0] = (SRCA)[0] + (SRCB)[0]; \
- (DST)[1] = (SRCA)[1] + (SRCB)[1]; \
-} while (0)
-
-/** In-place scalar multiplication */
-#define SCALE_2V( DST, SRCA, SRCB ) \
-do { \
- (DST)[0] = (SRCA)[0] * (SRCB)[0]; \
- (DST)[1] = (SRCA)[1] * (SRCB)[1]; \
-} while (0)
-
-/** In-place addition */
-#define ACC_2V( DST, SRC ) \
-do { \
- (DST)[0] += (SRC)[0]; \
- (DST)[1] += (SRC)[1]; \
-} while (0)
-
-/** Element-wise multiplication and addition */
-#define ACC_SCALE_2V( DST, SRCA, SRCB ) \
-do { \
- (DST)[0] += (SRCA)[0] * (SRCB)[0]; \
- (DST)[1] += (SRCA)[1] * (SRCB)[1]; \
-} while (0)
-
-/** Scalar multiplication */
-#define SCALE_SCALAR_2V( DST, S, SRCB ) \
-do { \
- (DST)[0] = S * (SRCB)[0]; \
- (DST)[1] = S * (SRCB)[1]; \
-} while (0)
-
-/** In-place scalar multiplication and addition */
-#define ACC_SCALE_SCALAR_2V( DST, S, SRCB ) \
-do { \
- (DST)[0] += S * (SRCB)[0]; \
- (DST)[1] += S * (SRCB)[1]; \
-} while (0)
-
-/** In-place scalar multiplication */
-#define SELF_SCALE_SCALAR_2V( DST, S ) \
-do { \
- (DST)[0] *= S; \
- (DST)[1] *= S; \
-} while (0)
-
-/** In-place scalar addition */
-#define ACC_SCALAR_2V( DST, S ) \
-do { \
- (DST)[0] += S; \
- (DST)[1] += S; \
-} while (0)
-
-
-
-/**
- * Linear interpolation
- *
- * \note \p OUT argument is evaluated twice!
- * \note Be wary of using *coord++ as an argument to any of these macros!
- */
-#define LINTERP(T, OUT, IN) ((OUT) + (T) * ((IN) - (OUT)))
-
-/* Can do better with integer math
- */
-#define INTERP_UB( t, dstub, outub, inub ) \
-do { \
- GLfloat inf = UBYTE_TO_FLOAT( inub ); \
- GLfloat outf = UBYTE_TO_FLOAT( outub ); \
- GLfloat dstf = LINTERP( t, outf, inf ); \
- UNCLAMPED_FLOAT_TO_UBYTE( dstub, dstf ); \
-} while (0)
-
-#define INTERP_CHAN( t, dstc, outc, inc ) \
-do { \
- GLfloat inf = CHAN_TO_FLOAT( inc ); \
- GLfloat outf = CHAN_TO_FLOAT( outc ); \
- GLfloat dstf = LINTERP( t, outf, inf ); \
- UNCLAMPED_FLOAT_TO_CHAN( dstc, dstf ); \
-} while (0)
-
-#define INTERP_UI( t, dstui, outui, inui ) \
- dstui = (GLuint) (GLint) LINTERP( (t), (GLfloat) (outui), (GLfloat) (inui) )
-
-#define INTERP_F( t, dstf, outf, inf ) \
- dstf = LINTERP( t, outf, inf )
-
-#define INTERP_4F( t, dst, out, in ) \
-do { \
- dst[0] = LINTERP( (t), (out)[0], (in)[0] ); \
- dst[1] = LINTERP( (t), (out)[1], (in)[1] ); \
- dst[2] = LINTERP( (t), (out)[2], (in)[2] ); \
- dst[3] = LINTERP( (t), (out)[3], (in)[3] ); \
-} while (0)
-
-#define INTERP_3F( t, dst, out, in ) \
-do { \
- dst[0] = LINTERP( (t), (out)[0], (in)[0] ); \
- dst[1] = LINTERP( (t), (out)[1], (in)[1] ); \
- dst[2] = LINTERP( (t), (out)[2], (in)[2] ); \
-} while (0)
-
-#define INTERP_4CHAN( t, dst, out, in ) \
-do { \
- INTERP_CHAN( (t), (dst)[0], (out)[0], (in)[0] ); \
- INTERP_CHAN( (t), (dst)[1], (out)[1], (in)[1] ); \
- INTERP_CHAN( (t), (dst)[2], (out)[2], (in)[2] ); \
- INTERP_CHAN( (t), (dst)[3], (out)[3], (in)[3] ); \
-} while (0)
-
-#define INTERP_3CHAN( t, dst, out, in ) \
-do { \
- INTERP_CHAN( (t), (dst)[0], (out)[0], (in)[0] ); \
- INTERP_CHAN( (t), (dst)[1], (out)[1], (in)[1] ); \
- INTERP_CHAN( (t), (dst)[2], (out)[2], (in)[2] ); \
-} while (0)
-
-#define INTERP_SZ( t, vec, to, out, in, sz ) \
-do { \
- switch (sz) { \
- case 4: vec[to][3] = LINTERP( (t), (vec)[out][3], (vec)[in][3] ); \
- case 3: vec[to][2] = LINTERP( (t), (vec)[out][2], (vec)[in][2] ); \
- case 2: vec[to][1] = LINTERP( (t), (vec)[out][1], (vec)[in][1] ); \
- case 1: vec[to][0] = LINTERP( (t), (vec)[out][0], (vec)[in][0] ); \
- } \
-} while(0)
-
-
-
-/** Assign scalers to short vectors */
-#define ASSIGN_2V( V, V0, V1 ) \
-do { \
- V[0] = V0; \
- V[1] = V1; \
-} while(0)
-
-/*@}*/
-
-
-
-/** Clamp X to [MIN,MAX] */
-#define CLAMP( X, MIN, MAX ) ( (X)<(MIN) ? (MIN) : ((X)>(MAX) ? (MAX) : (X)) )
-
-/** Assign X to CLAMP(X, MIN, MAX) */
-#define CLAMP_SELF(x, mn, mx) \
- ( (x)<(mn) ? ((x) = (mn)) : ((x)>(mx) ? ((x)=(mx)) : (x)) )
-
-
-
-/** Minimum of two values: */
-#define MIN2( A, B ) ( (A)<(B) ? (A) : (B) )
-
-/** Maximum of two values: */
-#define MAX2( A, B ) ( (A)>(B) ? (A) : (B) )
-
-/** Dot product of two 2-element vectors */
-#define DOT2( a, b ) ( (a)[0]*(b)[0] + (a)[1]*(b)[1] )
-
-/** Dot product of two 3-element vectors */
-#define DOT3( a, b ) ( (a)[0]*(b)[0] + (a)[1]*(b)[1] + (a)[2]*(b)[2] )
-
-/** Dot product of two 4-element vectors */
-#define DOT4( a, b ) ( (a)[0]*(b)[0] + (a)[1]*(b)[1] + \
- (a)[2]*(b)[2] + (a)[3]*(b)[3] )
-
-/** Dot product of two 4-element vectors */
-#define DOT4V(v,a,b,c,d) (v[0]*(a) + v[1]*(b) + v[2]*(c) + v[3]*(d))
-
-
-/** Cross product of two 3-element vectors */
-#define CROSS3(n, u, v) \
-do { \
- (n)[0] = (u)[1]*(v)[2] - (u)[2]*(v)[1]; \
- (n)[1] = (u)[2]*(v)[0] - (u)[0]*(v)[2]; \
- (n)[2] = (u)[0]*(v)[1] - (u)[1]*(v)[0]; \
-} while (0)
-
-
-/* Normalize a 3-element vector to unit length. */
-#define NORMALIZE_3FV( V ) \
-do { \
- GLfloat len = (GLfloat) LEN_SQUARED_3FV(V); \
- if (len) { \
- len = INV_SQRTF(len); \
- (V)[0] = (GLfloat) ((V)[0] * len); \
- (V)[1] = (GLfloat) ((V)[1] * len); \
- (V)[2] = (GLfloat) ((V)[2] * len); \
- } \
-} while(0)
-
-#define LEN_3FV( V ) (SQRTF((V)[0]*(V)[0]+(V)[1]*(V)[1]+(V)[2]*(V)[2]))
-#define LEN_2FV( V ) (SQRTF((V)[0]*(V)[0]+(V)[1]*(V)[1]))
-
-#define LEN_SQUARED_3FV( V ) ((V)[0]*(V)[0]+(V)[1]*(V)[1]+(V)[2]*(V)[2])
-#define LEN_SQUARED_2FV( V ) ((V)[0]*(V)[0]+(V)[1]*(V)[1])
-
-
-#endif
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-08 21:30:47 +0000