273 lines
7.4 KiB
C
273 lines
7.4 KiB
C
/* SPDX-FileCopyrightText: 2011-2022 Blender Foundation
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*
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* SPDX-License-Identifier: Apache-2.0 */
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#pragma once
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#include "kernel/svm/types.h"
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#include "kernel/tables.h"
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#include "util/math.h"
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#include "util/types.h"
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CCL_NAMESPACE_BEGIN
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ccl_device void svm_vector_math(ccl_private float *value,
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ccl_private float3 *vector,
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NodeVectorMathType type,
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const float3 a,
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const float3 b,
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const float3 c,
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float param1)
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{
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switch (type) {
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case NODE_VECTOR_MATH_ADD:
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*vector = a + b;
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break;
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case NODE_VECTOR_MATH_SUBTRACT:
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*vector = a - b;
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break;
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case NODE_VECTOR_MATH_MULTIPLY:
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*vector = a * b;
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break;
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case NODE_VECTOR_MATH_DIVIDE:
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*vector = safe_divide(a, b);
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break;
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case NODE_VECTOR_MATH_CROSS_PRODUCT:
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*vector = cross(a, b);
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break;
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case NODE_VECTOR_MATH_PROJECT:
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*vector = project(a, b);
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break;
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case NODE_VECTOR_MATH_REFLECT:
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*vector = reflect(a, safe_normalize(b));
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break;
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case NODE_VECTOR_MATH_REFRACT:
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*vector = refract(a, safe_normalize(b), param1);
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break;
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case NODE_VECTOR_MATH_FACEFORWARD:
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*vector = faceforward(a, b, c);
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break;
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case NODE_VECTOR_MATH_MULTIPLY_ADD:
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*vector = a * b + c;
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break;
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case NODE_VECTOR_MATH_DOT_PRODUCT:
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*value = dot(a, b);
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break;
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case NODE_VECTOR_MATH_DISTANCE:
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*value = distance(a, b);
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break;
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case NODE_VECTOR_MATH_LENGTH:
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*value = len(a);
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break;
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case NODE_VECTOR_MATH_SCALE:
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*vector = a * param1;
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break;
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case NODE_VECTOR_MATH_NORMALIZE:
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*vector = safe_normalize(a);
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break;
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case NODE_VECTOR_MATH_SNAP:
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*vector = floor(safe_divide(a, b)) * b;
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break;
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case NODE_VECTOR_MATH_FLOOR:
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*vector = floor(a);
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break;
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case NODE_VECTOR_MATH_CEIL:
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*vector = ceil(a);
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break;
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case NODE_VECTOR_MATH_MODULO:
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*vector = make_float3(safe_modulo(a.x, b.x), safe_modulo(a.y, b.y), safe_modulo(a.z, b.z));
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break;
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case NODE_VECTOR_MATH_WRAP:
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*vector = make_float3(wrapf(a.x, b.x, c.x), wrapf(a.y, b.y, c.y), wrapf(a.z, b.z, c.z));
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break;
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case NODE_VECTOR_MATH_FRACTION:
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*vector = a - floor(a);
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break;
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case NODE_VECTOR_MATH_ABSOLUTE:
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*vector = fabs(a);
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break;
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case NODE_VECTOR_MATH_MINIMUM:
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*vector = min(a, b);
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break;
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case NODE_VECTOR_MATH_MAXIMUM:
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*vector = max(a, b);
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break;
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case NODE_VECTOR_MATH_SINE:
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*vector = make_float3(sinf(a.x), sinf(a.y), sinf(a.z));
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break;
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case NODE_VECTOR_MATH_COSINE:
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*vector = make_float3(cosf(a.x), cosf(a.y), cosf(a.z));
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break;
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case NODE_VECTOR_MATH_TANGENT:
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*vector = make_float3(tanf(a.x), tanf(a.y), tanf(a.z));
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break;
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default:
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*vector = zero_float3();
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*value = 0.0f;
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}
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}
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ccl_device float svm_math(NodeMathType type, const float a, float b, const float c)
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{
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switch (type) {
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case NODE_MATH_ADD:
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return a + b;
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case NODE_MATH_SUBTRACT:
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return a - b;
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case NODE_MATH_MULTIPLY:
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return a * b;
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case NODE_MATH_DIVIDE:
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return safe_divide(a, b);
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case NODE_MATH_POWER:
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return safe_powf(a, b);
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case NODE_MATH_LOGARITHM:
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return safe_logf(a, b);
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case NODE_MATH_SQRT:
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return safe_sqrtf(a);
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case NODE_MATH_INV_SQRT:
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return inversesqrtf(a);
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case NODE_MATH_ABSOLUTE:
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return fabsf(a);
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case NODE_MATH_RADIANS:
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return a * (M_PI_F / 180.0f);
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case NODE_MATH_DEGREES:
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return a * (180.0f / M_PI_F);
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case NODE_MATH_MINIMUM:
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return fminf(a, b);
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case NODE_MATH_MAXIMUM:
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return fmaxf(a, b);
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case NODE_MATH_LESS_THAN:
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return a < b;
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case NODE_MATH_GREATER_THAN:
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return a > b;
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case NODE_MATH_ROUND:
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return floorf(a + 0.5f);
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case NODE_MATH_FLOOR:
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return floorf(a);
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case NODE_MATH_CEIL:
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return ceilf(a);
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case NODE_MATH_FRACTION:
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return a - floorf(a);
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case NODE_MATH_MODULO:
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return safe_modulo(a, b);
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case NODE_MATH_FLOORED_MODULO:
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return safe_floored_modulo(a, b);
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case NODE_MATH_TRUNC:
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return a >= 0.0f ? floorf(a) : ceilf(a);
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case NODE_MATH_SNAP:
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return floorf(safe_divide(a, b)) * b;
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case NODE_MATH_WRAP:
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return wrapf(a, b, c);
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case NODE_MATH_PINGPONG:
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return pingpongf(a, b);
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case NODE_MATH_SINE:
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return sinf(a);
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case NODE_MATH_COSINE:
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return cosf(a);
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case NODE_MATH_TANGENT:
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return tanf(a);
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case NODE_MATH_SINH:
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return sinhf(a);
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case NODE_MATH_COSH:
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return coshf(a);
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case NODE_MATH_TANH:
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return tanhf(a);
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case NODE_MATH_ARCSINE:
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return safe_asinf(a);
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case NODE_MATH_ARCCOSINE:
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return safe_acosf(a);
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case NODE_MATH_ARCTANGENT:
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return atanf(a);
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case NODE_MATH_ARCTAN2:
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return compatible_atan2(a, b);
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case NODE_MATH_SIGN:
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return compatible_signf(a);
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case NODE_MATH_EXPONENT:
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return expf(a);
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case NODE_MATH_COMPARE:
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return ((a == b) || (fabsf(a - b) <= fmaxf(c, FLT_EPSILON))) ? 1.0f : 0.0f;
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case NODE_MATH_MULTIPLY_ADD:
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return a * b + c;
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case NODE_MATH_SMOOTH_MIN:
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return smoothminf(a, b, c);
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case NODE_MATH_SMOOTH_MAX:
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return -smoothminf(-a, -b, c);
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default:
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return 0.0f;
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}
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}
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ccl_device float3 svm_math_blackbody_color_rec709(const float t)
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{
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/* Calculate color in range 800..12000 using an approximation
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* a/x+bx+c for R and G and ((at + b)t + c)t + d) for B.
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*
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* The result of this can be negative to support gamut wider than
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* than rec.709, just needs to be clamped. */
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if (t >= 12000.0f) {
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return make_float3(0.8262954810464208f, 0.9945080501520986f, 1.566307710274283f);
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}
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if (t < 800.0f) {
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/* Arbitrary lower limit where light is very dim, matching OSL. */
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return make_float3(5.413294490189271f, -0.20319390035873933f, -0.0822535242887164f);
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}
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const int i = (t >= 6365.0f) ? 6 :
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(t >= 3315.0f) ? 5 :
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(t >= 1902.0f) ? 4 :
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(t >= 1449.0f) ? 3 :
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(t >= 1167.0f) ? 2 :
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(t >= 965.0f) ? 1 :
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0;
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ccl_constant float *r = blackbody_table_r[i];
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ccl_constant float *g = blackbody_table_g[i];
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ccl_constant float *b = blackbody_table_b[i];
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const float t_inv = 1.0f / t;
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return make_float3(r[0] * t_inv + r[1] * t + r[2],
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g[0] * t_inv + g[1] * t + g[2],
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((b[0] * t + b[1]) * t + b[2]) * t + b[3]);
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}
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ccl_device_inline float3 svm_math_gamma_color(float3 color, const float gamma)
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{
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if (gamma == 0.0f) {
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return make_float3(1.0f, 1.0f, 1.0f);
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}
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if (color.x > 0.0f) {
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color.x = powf(color.x, gamma);
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}
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if (color.y > 0.0f) {
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color.y = powf(color.y, gamma);
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}
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if (color.z > 0.0f) {
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color.z = powf(color.z, gamma);
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}
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return color;
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}
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ccl_device float3 svm_math_wavelength_color_xyz(const float lambda_nm)
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{
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float ii = (lambda_nm - 380.0f) * (1.0f / 5.0f); // scaled 0..80
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const int i = float_to_int(ii);
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float3 color;
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if (i < 0 || i >= 80) {
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color = make_float3(0.0f, 0.0f, 0.0f);
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}
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else {
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ii -= i;
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ccl_constant float *c = cie_color_match[i];
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color = interp(make_float3(c[0], c[1], c[2]), make_float3(c[3], c[4], c[5]), ii);
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}
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return color;
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}
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CCL_NAMESPACE_END
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