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/*
* Copyright 2011-2013 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 kernel_shader_evaluate(KernelGlobals *kg, ccl_global uint4 *input, ccl_global float4 *output, ShaderEvalType type, int i)
{
ShaderData sd;
uint4 in = input[i];
float3 out;
if(type == SHADER_EVAL_DISPLACE) {
/* setup shader data */
int object = in.x;
int prim = in.y;
float u = __uint_as_float(in.z);
float v = __uint_as_float(in.w);
shader_setup_from_displace(kg, &sd, object, prim, u, v);
/* evaluate */
float3 P = sd.P;
shader_eval_displacement(kg, &sd, SHADER_CONTEXT_MAIN);
out = sd.P - P;
}
else { // SHADER_EVAL_BACKGROUND
/* setup ray */
Ray ray;
float u = __uint_as_float(in.x);
float v = __uint_as_float(in.y);
ray.P = make_float3(0.0f, 0.0f, 0.0f);
ray.D = equirectangular_to_direction(u, v);
ray.t = 0.0f;
#ifdef __CAMERA_MOTION__
ray.time = 0.5f;
#endif
#ifdef __RAY_DIFFERENTIALS__
ray.dD = differential3_zero();
ray.dP = differential3_zero();
#endif
/* setup shader data */
shader_setup_from_background(kg, &sd, &ray, 0);
/* evaluate */
int flag = 0; /* we can't know which type of BSDF this is for */
out = shader_eval_background(kg, &sd, flag, SHADER_CONTEXT_MAIN);
}
/* write output */
output[i] = make_float4(out.x, out.y, out.z, 0.0f);
}
CCL_NAMESPACE_END
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