67 lines
2.7 KiB
C
67 lines
2.7 KiB
C
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/*
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Copyright (c) 2009 David Bucciarelli (davibu@interfree.it)
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Permission is hereby granted, free of charge, to any person obtaining
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a copy of this software and associated documentation files (the
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"Software"), to deal in the Software without restriction, including
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without limitation the rights to use, copy, modify, merge, publish,
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distribute, sublicense, and/or sell copies of the Software, and to
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permit persons to whom the Software is furnished to do so, subject to
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the following conditions:
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The above copyright notice and this permission notice shall be included
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in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#ifndef _VEC_H
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#define _VEC_H
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typedef struct {
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float x, y, z; // position, also color (r,g,b)
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} Vec;
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#define vinit(v, a, b, c) { (v).x = a; (v).y = b; (v).z = c; }
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#define vassign(a, b) vinit(a, (b).x, (b).y, (b).z)
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#define vclr(v) vinit(v, 0.f, 0.f, 0.f)
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#define vadd(v, a, b) vinit(v, (a).x + (b).x, (a).y + (b).y, (a).z + (b).z)
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#define vsub(v, a, b) vinit(v, (a).x - (b).x, (a).y - (b).y, (a).z - (b).z)
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#define vsadd(v, a, b) { float k = (a); vinit(v, (b).x + k, (b).y + k, (b).z + k) }
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#define vssub(v, a, b) { float k = (a); vinit(v, (b).x - k, (b).y - k, (b).z - k) }
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#define vmul(v, a, b) vinit(v, (a).x * (b).x, (a).y * (b).y, (a).z * (b).z)
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#define vsmul(v, a, b) { float k = (a); vinit(v, k * (b).x, k * (b).y, k * (b).z) }
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#define vdot(a, b) ((a).x * (b).x + (a).y * (b).y + (a).z * (b).z)
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#define vnorm(v) { float l = 1.f / sqrt(vdot(v, v)); vsmul(v, l, v); }
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#define vxcross(v, a, b) vinit(v, (a).y * (b).z - (a).z * (b).y, (a).z * (b).x - (a).x * (b).z, (a).x * (b).y - (a).y * (b).x)
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#define vfilter(v) ((v).x > (v).y && (v).x > (v).z ? (v).x : (v).y > (v).z ? (v).y : (v).z)
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#define viszero(v) (((v).x == 0.f) && ((v).x == 0.f) && ((v).z == 0.f))
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#ifndef GPU_KERNEL
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#define clamp(x, a, b) ((x) < (a) ? (a) : ((x) > (b) ? (b) : (x)))
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#define max(x, y) ( (x) > (y) ? (x) : (y))
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#define min(x, y) ( (x) < (y) ? (x) : (y))
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#define sign(x) ((x) > 0 ? 1 : -1)
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#endif
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#define toInt(x) ((int)(pow(clamp(x, 0.f, 1.f), 1.f / 2.2f) * 255.f + .5f))
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// Rendering flags
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#define RFLAGS_DISABLE_DIFFUSE_PATH 1
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// NOTE: workaround for an Apple OpenCL compiler bug
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#ifdef __APPLE__
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#define OCL_CONSTANT_BUFFER __global
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#else
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#define OCL_CONSTANT_BUFFER __constant
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#endif
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#endif /* _VEC_H */
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