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-rw-r--r--intern/cycles/kernel/svm/svm_math_util.h283
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diff --git a/intern/cycles/kernel/svm/svm_math_util.h b/intern/cycles/kernel/svm/svm_math_util.h
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--- a/intern/cycles/kernel/svm/svm_math_util.h
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-/*
- * Copyright 2011-2014 Blender Foundation
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-CCL_NAMESPACE_BEGIN
-
-ccl_device void svm_vector_math(ccl_private float *value,
- ccl_private float3 *vector,
- NodeVectorMathType type,
- float3 a,
- float3 b,
- float3 c,
- float param1)
-{
- switch (type) {
- case NODE_VECTOR_MATH_ADD:
- *vector = a + b;
- break;
- case NODE_VECTOR_MATH_SUBTRACT:
- *vector = a - b;
- break;
- case NODE_VECTOR_MATH_MULTIPLY:
- *vector = a * b;
- break;
- case NODE_VECTOR_MATH_DIVIDE:
- *vector = safe_divide_float3_float3(a, b);
- break;
- case NODE_VECTOR_MATH_CROSS_PRODUCT:
- *vector = cross(a, b);
- break;
- case NODE_VECTOR_MATH_PROJECT:
- *vector = project(a, b);
- break;
- case NODE_VECTOR_MATH_REFLECT:
- *vector = reflect(a, b);
- break;
- case NODE_VECTOR_MATH_REFRACT:
- *vector = refract(a, normalize(b), param1);
- break;
- case NODE_VECTOR_MATH_FACEFORWARD:
- *vector = faceforward(a, b, c);
- break;
- case NODE_VECTOR_MATH_MULTIPLY_ADD:
- *vector = a * b + c;
- break;
- case NODE_VECTOR_MATH_DOT_PRODUCT:
- *value = dot(a, b);
- break;
- case NODE_VECTOR_MATH_DISTANCE:
- *value = distance(a, b);
- break;
- case NODE_VECTOR_MATH_LENGTH:
- *value = len(a);
- break;
- case NODE_VECTOR_MATH_SCALE:
- *vector = a * param1;
- break;
- case NODE_VECTOR_MATH_NORMALIZE:
- *vector = safe_normalize(a);
- break;
- case NODE_VECTOR_MATH_SNAP:
- *vector = floor(safe_divide_float3_float3(a, b)) * b;
- break;
- case NODE_VECTOR_MATH_FLOOR:
- *vector = floor(a);
- break;
- case NODE_VECTOR_MATH_CEIL:
- *vector = ceil(a);
- break;
- case NODE_VECTOR_MATH_MODULO:
- *vector = make_float3(safe_modulo(a.x, b.x), safe_modulo(a.y, b.y), safe_modulo(a.z, b.z));
- break;
- case NODE_VECTOR_MATH_WRAP:
- *vector = make_float3(wrapf(a.x, b.x, c.x), wrapf(a.y, b.y, c.y), wrapf(a.z, b.z, c.z));
- break;
- case NODE_VECTOR_MATH_FRACTION:
- *vector = a - floor(a);
- break;
- case NODE_VECTOR_MATH_ABSOLUTE:
- *vector = fabs(a);
- break;
- case NODE_VECTOR_MATH_MINIMUM:
- *vector = min(a, b);
- break;
- case NODE_VECTOR_MATH_MAXIMUM:
- *vector = max(a, b);
- break;
- case NODE_VECTOR_MATH_SINE:
- *vector = make_float3(sinf(a.x), sinf(a.y), sinf(a.z));
- break;
- case NODE_VECTOR_MATH_COSINE:
- *vector = make_float3(cosf(a.x), cosf(a.y), cosf(a.z));
- break;
- case NODE_VECTOR_MATH_TANGENT:
- *vector = make_float3(tanf(a.x), tanf(a.y), tanf(a.z));
- break;
- default:
- *vector = zero_float3();
- *value = 0.0f;
- }
-}
-
-ccl_device float svm_math(NodeMathType type, float a, float b, float c)
-{
- switch (type) {
- case NODE_MATH_ADD:
- return a + b;
- case NODE_MATH_SUBTRACT:
- return a - b;
- case NODE_MATH_MULTIPLY:
- return a * b;
- case NODE_MATH_DIVIDE:
- return safe_divide(a, b);
- case NODE_MATH_POWER:
- return safe_powf(a, b);
- case NODE_MATH_LOGARITHM:
- return safe_logf(a, b);
- case NODE_MATH_SQRT:
- return safe_sqrtf(a);
- case NODE_MATH_INV_SQRT:
- return inversesqrtf(a);
- case NODE_MATH_ABSOLUTE:
- return fabsf(a);
- case NODE_MATH_RADIANS:
- return a * (M_PI_F / 180.0f);
- case NODE_MATH_DEGREES:
- return a * (180.0f / M_PI_F);
- case NODE_MATH_MINIMUM:
- return fminf(a, b);
- case NODE_MATH_MAXIMUM:
- return fmaxf(a, b);
- case NODE_MATH_LESS_THAN:
- return a < b;
- case NODE_MATH_GREATER_THAN:
- return a > b;
- case NODE_MATH_ROUND:
- return floorf(a + 0.5f);
- case NODE_MATH_FLOOR:
- return floorf(a);
- case NODE_MATH_CEIL:
- return ceilf(a);
- case NODE_MATH_FRACTION:
- return a - floorf(a);
- case NODE_MATH_MODULO:
- return safe_modulo(a, b);
- case NODE_MATH_TRUNC:
- return a >= 0.0f ? floorf(a) : ceilf(a);
- case NODE_MATH_SNAP:
- return floorf(safe_divide(a, b)) * b;
- case NODE_MATH_WRAP:
- return wrapf(a, b, c);
- case NODE_MATH_PINGPONG:
- return pingpongf(a, b);
- case NODE_MATH_SINE:
- return sinf(a);
- case NODE_MATH_COSINE:
- return cosf(a);
- case NODE_MATH_TANGENT:
- return tanf(a);
- case NODE_MATH_SINH:
- return sinhf(a);
- case NODE_MATH_COSH:
- return coshf(a);
- case NODE_MATH_TANH:
- return tanhf(a);
- case NODE_MATH_ARCSINE:
- return safe_asinf(a);
- case NODE_MATH_ARCCOSINE:
- return safe_acosf(a);
- case NODE_MATH_ARCTANGENT:
- return atanf(a);
- case NODE_MATH_ARCTAN2:
- return atan2f(a, b);
- case NODE_MATH_SIGN:
- return compatible_signf(a);
- case NODE_MATH_EXPONENT:
- return expf(a);
- case NODE_MATH_COMPARE:
- return ((a == b) || (fabsf(a - b) <= fmaxf(c, FLT_EPSILON))) ? 1.0f : 0.0f;
- case NODE_MATH_MULTIPLY_ADD:
- return a * b + c;
- case NODE_MATH_SMOOTH_MIN:
- return smoothminf(a, b, c);
- case NODE_MATH_SMOOTH_MAX:
- return -smoothminf(-a, -b, c);
- default:
- return 0.0f;
- }
-}
-
-ccl_device float3 svm_math_blackbody_color(float t)
-{
- /* TODO(lukas): Reimplement in XYZ. */
-
- /* Calculate color in range 800..12000 using an approximation
- * a/x+bx+c for R and G and ((at + b)t + c)t + d) for B
- * Max absolute error for RGB is (0.00095, 0.00077, 0.00057),
- * which is enough to get the same 8 bit/channel color.
- */
-
- const float blackbody_table_r[6][3] = {
- {2.52432244e+03f, -1.06185848e-03f, 3.11067539e+00f},
- {3.37763626e+03f, -4.34581697e-04f, 1.64843306e+00f},
- {4.10671449e+03f, -8.61949938e-05f, 6.41423749e-01f},
- {4.66849800e+03f, 2.85655028e-05f, 1.29075375e-01f},
- {4.60124770e+03f, 2.89727618e-05f, 1.48001316e-01f},
- {3.78765709e+03f, 9.36026367e-06f, 3.98995841e-01f},
- };
-
- const float blackbody_table_g[6][3] = {
- {-7.50343014e+02f, 3.15679613e-04f, 4.73464526e-01f},
- {-1.00402363e+03f, 1.29189794e-04f, 9.08181524e-01f},
- {-1.22075471e+03f, 2.56245413e-05f, 1.20753416e+00f},
- {-1.42546105e+03f, -4.01730887e-05f, 1.44002695e+00f},
- {-1.18134453e+03f, -2.18913373e-05f, 1.30656109e+00f},
- {-5.00279505e+02f, -4.59745390e-06f, 1.09090465e+00f},
- };
-
- const float blackbody_table_b[6][4] = {
- {0.0f, 0.0f, 0.0f, 0.0f}, /* zeros should be optimized by compiler */
- {0.0f, 0.0f, 0.0f, 0.0f},
- {0.0f, 0.0f, 0.0f, 0.0f},
- {-2.02524603e-11f, 1.79435860e-07f, -2.60561875e-04f, -1.41761141e-02f},
- {-2.22463426e-13f, -1.55078698e-08f, 3.81675160e-04f, -7.30646033e-01f},
- {6.72595954e-13f, -2.73059993e-08f, 4.24068546e-04f, -7.52204323e-01f},
- };
-
- if (t >= 12000.0f) {
- return make_float3(0.826270103f, 0.994478524f, 1.56626022f);
- }
- else if (t < 965.0f) {
- /* For 800 <= t < 965 color does not change in OSL implementation, so keep color the same */
- return make_float3(4.70366907f, 0.0f, 0.0f);
- }
-
- /* Manually align for readability. */
- /* clang-format off */
- int i = (t >= 6365.0f) ? 5 :
- (t >= 3315.0f) ? 4 :
- (t >= 1902.0f) ? 3 :
- (t >= 1449.0f) ? 2 :
- (t >= 1167.0f) ? 1 :
- 0;
- /* clang-format on */
-
- ccl_constant float *r = blackbody_table_r[i];
- ccl_constant float *g = blackbody_table_g[i];
- ccl_constant float *b = blackbody_table_b[i];
-
- const float t_inv = 1.0f / t;
- return make_float3(r[0] * t_inv + r[1] * t + r[2],
- g[0] * t_inv + g[1] * t + g[2],
- ((b[0] * t + b[1]) * t + b[2]) * t + b[3]);
-}
-
-ccl_device_inline float3 svm_math_gamma_color(float3 color, float gamma)
-{
- if (gamma == 0.0f)
- return make_float3(1.0f, 1.0f, 1.0f);
-
- if (color.x > 0.0f)
- color.x = powf(color.x, gamma);
- if (color.y > 0.0f)
- color.y = powf(color.y, gamma);
- if (color.z > 0.0f)
- color.z = powf(color.z, gamma);
-
- return color;
-}
-
-CCL_NAMESPACE_END
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