diff options
author | Brecht Van Lommel <brechtvanlommel@pandora.be> | 2010-01-22 14:10:24 +0300 |
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committer | Brecht Van Lommel <brechtvanlommel@pandora.be> | 2010-01-22 14:10:24 +0300 |
commit | 8ec59c7c687b9e50c48a9d455b31ff4c01df69d2 (patch) | |
tree | 32bf65aad65475c5dd9aeefa9067eba21e7324fb /source/blender/blenlib/intern/math_base_inline.c | |
parent | 2d2339a70992b819a23e8c71f68027022b395f46 (diff) |
Math Lib:
* inline some more functions, from math_base and math_vector
* also made some changes to the way inline is done so it can
work for more than one file
* reflect_v3_v3v3 requires input vectors to be normalized now.
* added rgb_to_grayscale
* added zero_v4, copy_v4_v4, swap_v4_v4, is_one_v3
* added box_clip_bounds_m4 to clip a bounding box against a
projection matrix
Diffstat (limited to 'source/blender/blenlib/intern/math_base_inline.c')
-rw-r--r-- | source/blender/blenlib/intern/math_base_inline.c | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/source/blender/blenlib/intern/math_base_inline.c b/source/blender/blenlib/intern/math_base_inline.c new file mode 100644 index 00000000000..71a0d2cc654 --- /dev/null +++ b/source/blender/blenlib/intern/math_base_inline.c @@ -0,0 +1,127 @@ +/** + * $Id$ + * + * ***** BEGIN GPL LICENSE BLOCK ***** + * + * 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * + * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV. + * All rights reserved. + * + * The Original Code is: some of this file. + * + * ***** END GPL LICENSE BLOCK ***** + * */ + +#include <float.h> +#include <math.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +#include "BLI_math.h" + +#ifndef BLI_MATH_BASE_INLINE +#define BLI_MATH_BASE_INLINE + +/* A few small defines. Keep'em local! */ +#define SMALL_NUMBER 1.e-8 + +MINLINE float sqrt3f(float f) +{ + if(f==0.0) return 0; + if(f<0) return (float)(-exp(log(-f)/3)); + else return (float)(exp(log(f)/3)); +} + +MINLINE double sqrt3d(double d) +{ + if(d==0.0) return 0; + if(d<0) return -exp(log(-d)/3); + else return exp(log(d)/3); +} + +MINLINE float saacos(float fac) +{ + if(fac<= -1.0f) return (float)M_PI; + else if(fac>=1.0f) return 0.0; + else return (float)acos(fac); +} + +MINLINE float saasin(float fac) +{ + if(fac<= -1.0f) return (float)-M_PI/2.0f; + else if(fac>=1.0f) return (float)M_PI/2.0f; + else return (float)asin(fac); +} + +MINLINE float sasqrt(float fac) +{ + if(fac<=0.0) return 0.0; + return (float)sqrt(fac); +} + +MINLINE float saacosf(float fac) +{ + if(fac<= -1.0f) return (float)M_PI; + else if(fac>=1.0f) return 0.0f; + else return (float)acosf(fac); +} + +MINLINE float saasinf(float fac) +{ + if(fac<= -1.0f) return (float)-M_PI/2.0f; + else if(fac>=1.0f) return (float)M_PI/2.0f; + else return (float)asinf(fac); +} + +MINLINE float sasqrtf(float fac) +{ + if(fac<=0.0) return 0.0; + return (float)sqrtf(fac); +} + +MINLINE float interpf(float target, float origin, float fac) +{ + return (fac*target) + (1.0f-fac)*origin; +} + +/* useful to calculate an even width shell, by taking the angle between 2 planes. + * The return value is a scale on the offset. + * no angle between planes is 1.0, as the angle between the 2 planes approches 180d + * the distance gets very high, 180d would be inf, but this case isn't valid */ +MINLINE float shell_angle_to_dist(const float angle) +{ + return (angle < SMALL_NUMBER) ? 1.0f : fabsf(1.0f / cosf(angle * (M_PI/180.0f))); +} + +/* used for zoom values*/ +MINLINE float power_of_2(float val) +{ + return (float)pow(2, ceil(log(val) / log(2))); +} + +MINLINE float minf(float a, float b) +{ + return (a < b)? a: b; +} + +MINLINE float maxf(float a, float b) +{ + return (a > b)? a: b; +} + +#endif /* BLI_MATH_BASE_INLINE */ + |