Bulk update nvpro-samples 05/17/21

Changing license from BSD-3 to Apache2

ray_tracing_specialization/shaders/raytrace.rgen

@@ -0,0 +1,77 @@
+/*
+ * Copyright (c) 2019-2021, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * 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.
+ *
+ * SPDX-FileCopyrightText: Copyright (c) 2019-2021 NVIDIA CORPORATION
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#version 460
+#extension GL_EXT_ray_tracing : require
+#extension GL_GOOGLE_include_directive : enable
+#include "raycommon.glsl"
+
+layout(binding = 0, set = 0) uniform accelerationStructureEXT topLevelAS;
+layout(binding = 1, set = 0, rgba32f) uniform image2D image;
+
+layout(location = 0) rayPayloadEXT hitPayload prd;
+
+layout(binding = 0, set = 1) uniform CameraProperties
+{
+  mat4 view;
+  mat4 proj;
+  mat4 viewInverse;
+  mat4 projInverse;
+}
+cam;
+
+layout(push_constant) uniform Constants
+{
+  vec4  clearColor;
+  vec3  lightPosition;
+  float lightIntensity;
+  int   lightType;
+  int   specialization;
+}
+pushC;
+
+void main()
+{
+  const vec2 pixelCenter = vec2(gl_LaunchIDEXT.xy) + vec2(0.5);
+  const vec2 inUV        = pixelCenter / vec2(gl_LaunchSizeEXT.xy);
+  vec2       d           = inUV * 2.0 - 1.0;
+
+  vec4 origin    = cam.viewInverse * vec4(0, 0, 0, 1);
+  vec4 target    = cam.projInverse * vec4(d.x, d.y, 1, 1);
+  vec4 direction = cam.viewInverse * vec4(normalize(target.xyz), 0);
+
+  uint  rayFlags = gl_RayFlagsOpaqueEXT;
+  float tMin     = 0.001;
+  float tMax     = 10000.0;
+
+  traceRayEXT(topLevelAS,            // acceleration structure
+              rayFlags,              // rayFlags
+              0xFF,                  // cullMask
+              pushC.specialization,  // sbtRecordOffset
+              0,                     // sbtRecordStride
+              0,                     // missIndex
+              origin.xyz,            // ray origin
+              tMin,                  // ray min range
+              direction.xyz,         // ray direction
+              tMax,                  // ray max range
+              0                      // payload (location = 0)
+  );
+
+  imageStore(image, ivec2(gl_LaunchIDEXT.xy), vec4(prd.hitValue, 1.0));
+}