Add Chromium-only Blender WebEngine parity work

blender-5.2.0/intern/cycles/kernel/geom/point.h

@@ -0,0 +1,100 @@
+/* SPDX-FileCopyrightText: 2021-2022 Blender Foundation
+ *
+ * SPDX-License-Identifier: Apache-2.0 */
+
+#pragma once
+
+#include "kernel/globals.h"
+
+#include "kernel/geom/attribute.h"
+#include "kernel/geom/motion_point.h"
+#include "kernel/geom/object.h"
+
+CCL_NAMESPACE_BEGIN
+
+/* Point Primitive
+ *
+ * Point primitive for rendering point clouds.
+ */
+
+#ifdef __POINTCLOUD__
+
+/* Reading attributes on various point elements */
+
+template<typename T>
+ccl_device T point_attribute(KernelGlobals kg,
+                             const ccl_private ShaderData *sd,
+                             const AttributeDescriptor desc)
+{
+  if (desc.element & ATTR_ELEMENT_VERTEX) {
+    return T(attribute_data_fetch<dual_base_t<T>>(kg, desc.element, desc.offset + sd->prim));
+  }
+  return make_zero<T>();
+}
+
+/* Point position */
+
+ccl_device float3 point_position(KernelGlobals kg, const ccl_private ShaderData *sd)
+{
+  if (sd->type & PRIMITIVE_POINT) {
+    /* World space center. */
+    const int position_offset = kernel_data_fetch(objects, sd->object).position_offset;
+    float3 P = (sd->type & PRIMITIVE_MOTION) ?
+                   make_float3(motion_point(kg, sd->object, sd->prim, sd->time)) :
+                   make_float3(kernel_data_fetch(points, position_offset + sd->prim));
+
+    if (!(sd->object_flag & SD_OBJECT_TRANSFORM_APPLIED)) {
+      object_position_transform(kg, sd, &P);
+    }
+
+    return P;
+  }
+
+  return zero_float3();
+}
+
+/* Point radius */
+
+ccl_device float point_radius(KernelGlobals kg, const ccl_private ShaderData *sd)
+{
+  if (sd->type & PRIMITIVE_POINT) {
+    /* World space radius. */
+    const int position_offset = kernel_data_fetch(objects, sd->object).position_offset;
+    const float r = kernel_data_fetch(points, position_offset + sd->prim).w;
+
+    if (sd->object_flag & SD_OBJECT_TRANSFORM_APPLIED) {
+      return r;
+    }
+
+    const float normalized_r = r * (1.0f / M_SQRT3_F);
+    float3 dir = make_float3(normalized_r, normalized_r, normalized_r);
+    object_dir_transform(kg, sd, &dir);
+    return len(dir);
+  }
+
+  return 0.0f;
+}
+
+/* Point random */
+
+ccl_device float point_random(KernelGlobals kg, const ccl_private ShaderData *sd)
+{
+  if (sd->type & PRIMITIVE_POINT) {
+    const AttributeDescriptor desc = find_attribute(kg, sd, ATTR_STD_POINT_RANDOM);
+    return is_attribute_found(desc) ? point_attribute<float>(kg, sd, desc) : 0.0f;
+  }
+  return 0.0f;
+}
+
+/* Point location for motion pass, linear interpolation between keys and
+ * ignoring radius because we do the same for the motion keys */
+
+ccl_device float3 point_motion_center_location(KernelGlobals kg, const ccl_private ShaderData *sd)
+{
+  const int position_offset = kernel_data_fetch(objects, sd->object).position_offset;
+  return make_float3(kernel_data_fetch(points, position_offset + sd->prim));
+}
+
+#endif /* __POINTCLOUD__ */
+
+CCL_NAMESPACE_END