c2a2f3553a
This patch unifies the names of math functions for different data types and uses overloading instead. The goal is to make it possible to swap out all the float3 variables containing RGB data with something else, with as few as possible changes to the code. It's a requirement for future spectral rendering patches. Differential Revision: https://developer.blender.org/D15276
107 lines
3.4 KiB
C
107 lines
3.4 KiB
C
/* SPDX-License-Identifier: Apache-2.0
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* Copyright 2011-2022 Blender Foundation */
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#pragma once
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#include "kernel/camera/projection.h"
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#include "kernel/integrator/shader_eval.h"
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#include "kernel/geom/geom.h"
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CCL_NAMESPACE_BEGIN
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ccl_device void kernel_displace_evaluate(KernelGlobals kg,
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ccl_global const KernelShaderEvalInput *input,
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ccl_global float *output,
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const int offset)
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{
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/* Setup shader data. */
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const KernelShaderEvalInput in = input[offset];
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ShaderData sd;
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shader_setup_from_displace(kg, &sd, in.object, in.prim, in.u, in.v);
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/* Evaluate displacement shader. */
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const float3 P = sd.P;
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shader_eval_displacement(kg, INTEGRATOR_STATE_NULL, &sd);
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float3 D = sd.P - P;
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object_inverse_dir_transform(kg, &sd, &D);
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#ifdef __KERNEL_DEBUG_NAN__
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if (!isfinite_safe(D)) {
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kernel_assert(!"Cycles displacement with non-finite value detected");
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}
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#endif
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/* Ensure finite displacement, preventing BVH from becoming degenerate and avoiding possible
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* traversal issues caused by non-finite math. */
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D = ensure_finite(D);
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/* Write output. */
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output[offset * 3 + 0] += D.x;
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output[offset * 3 + 1] += D.y;
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output[offset * 3 + 2] += D.z;
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}
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ccl_device void kernel_background_evaluate(KernelGlobals kg,
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ccl_global const KernelShaderEvalInput *input,
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ccl_global float *output,
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const int offset)
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{
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/* Setup ray */
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const KernelShaderEvalInput in = input[offset];
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const float3 ray_P = zero_float3();
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const float3 ray_D = equirectangular_to_direction(in.u, in.v);
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const float ray_time = 0.5f;
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/* Setup shader data. */
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ShaderData sd;
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shader_setup_from_background(kg, &sd, ray_P, ray_D, ray_time);
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/* Evaluate shader.
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* This is being evaluated for all BSDFs, so path flag does not contain a specific type. */
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const uint32_t path_flag = PATH_RAY_EMISSION;
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shader_eval_surface<KERNEL_FEATURE_NODE_MASK_SURFACE_LIGHT &
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~(KERNEL_FEATURE_NODE_RAYTRACE | KERNEL_FEATURE_NODE_LIGHT_PATH)>(
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kg, INTEGRATOR_STATE_NULL, &sd, NULL, path_flag);
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float3 color = shader_background_eval(&sd);
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#ifdef __KERNEL_DEBUG_NAN__
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if (!isfinite_safe(color)) {
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kernel_assert(!"Cycles background with non-finite value detected");
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}
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#endif
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/* Ensure finite color, avoiding possible numerical instabilities in the path tracing kernels. */
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color = ensure_finite(color);
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/* Write output. */
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output[offset * 3 + 0] += color.x;
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output[offset * 3 + 1] += color.y;
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output[offset * 3 + 2] += color.z;
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}
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ccl_device void kernel_curve_shadow_transparency_evaluate(
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KernelGlobals kg,
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ccl_global const KernelShaderEvalInput *input,
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ccl_global float *output,
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const int offset)
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{
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/* Setup shader data. */
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const KernelShaderEvalInput in = input[offset];
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ShaderData sd;
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shader_setup_from_curve(kg, &sd, in.object, in.prim, __float_as_int(in.v), in.u);
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/* Evaluate transparency. */
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shader_eval_surface<KERNEL_FEATURE_NODE_MASK_SURFACE_SHADOW &
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~(KERNEL_FEATURE_NODE_RAYTRACE | KERNEL_FEATURE_NODE_LIGHT_PATH)>(
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kg, INTEGRATOR_STATE_NULL, &sd, NULL, PATH_RAY_SHADOW);
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/* Write output. */
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output[offset] = clamp(average(shader_bsdf_transparency(kg, &sd)), 0.0f, 1.0f);
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}
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CCL_NAMESPACE_END
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