kernel/svm/camera.h

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/* SPDX-FileCopyrightText: 2011-2022 Blender Foundation
 *
 * SPDX-License-Identifier: Apache-2.0 */
 
#pragma once
 
#include "kernel/globals.h"
 
#include "kernel/svm/util.h"
 
CCL_NAMESPACE_BEGIN
 
ccl_device_noinline void svm_node_camera(KernelGlobals kg,
                                         ccl_private ShaderData *sd,
                                         ccl_private float *stack,
                                         const uint out_vector,
                                         const uint out_zdepth,
                                         const uint out_distance)
{
  float distance;
  float zdepth;
  float3 vector;
 
  const Transform tfm = kernel_data.cam.worldtocamera;
  vector = transform_point(&tfm, sd->P);
  zdepth = vector.z;
  distance = len(vector);
 
  if (stack_valid(out_vector)) {
    stack_store_float3(stack, out_vector, normalize(vector));
  }
 
  if (stack_valid(out_zdepth)) {
    stack_store_float(stack, out_zdepth, zdepth);
  }
 
  if (stack_valid(out_distance)) {
    stack_store_float(stack, out_distance, distance);
  }
}
 
CCL_NAMESPACE_END