initial commit, 4.5 stable

core/math/static_raycaster.h

@@ -0,0 +1,98 @@
+/**************************************************************************/
+/*  static_raycaster.h                                                    */
+/**************************************************************************/
+/*                         This file is part of:                          */
+/*                             GODOT ENGINE                               */
+/*                        https://godotengine.org                         */
+/**************************************************************************/
+/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
+/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
+/*                                                                        */
+/* Permission is hereby granted, free of charge, to any person obtaining  */
+/* a copy of this software and associated documentation files (the        */
+/* "Software"), to deal in the Software without restriction, including    */
+/* without limitation the rights to use, copy, modify, merge, publish,    */
+/* distribute, sublicense, and/or sell copies of the Software, and to     */
+/* permit persons to whom the Software is furnished to do so, subject to  */
+/* the following conditions:                                              */
+/*                                                                        */
+/* The above copyright notice and this permission notice shall be         */
+/* included in all copies or substantial portions of the Software.        */
+/*                                                                        */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,        */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF     */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY   */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,   */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE      */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                 */
+/**************************************************************************/
+
+#pragma once
+
+#include "core/object/ref_counted.h"
+
+class StaticRaycaster : public RefCounted {
+	GDCLASS(StaticRaycaster, RefCounted)
+protected:
+	static StaticRaycaster *(*create_function)();
+
+public:
+	// Compatible with embree4 rays.
+	struct alignas(16) Ray {
+		const static unsigned int INVALID_GEOMETRY_ID = ((unsigned int)-1); // from rtcore_common.h
+
+		/*! Default construction does nothing. */
+		_FORCE_INLINE_ Ray() :
+				geomID(INVALID_GEOMETRY_ID) {}
+
+		/*! Constructs a ray from origin, direction, and ray segment. Near
+		 *  has to be smaller than far. */
+		_FORCE_INLINE_ Ray(const Vector3 &p_org,
+				const Vector3 &p_dir,
+				float p_tnear = 0.0f,
+				float p_tfar = Math::INF) :
+				org(p_org),
+				tnear(p_tnear),
+				dir(p_dir),
+				time(0.0f),
+				tfar(p_tfar),
+				mask(-1),
+				u(0.0),
+				v(0.0),
+				primID(INVALID_GEOMETRY_ID),
+				geomID(INVALID_GEOMETRY_ID),
+				instID(INVALID_GEOMETRY_ID) {}
+
+		/*! Tests if we hit something. */
+		_FORCE_INLINE_ explicit operator bool() const { return geomID != INVALID_GEOMETRY_ID; }
+
+	public:
+		Vector3 org; //!< Ray origin + tnear
+		float tnear; //!< Start of ray segment
+		Vector3 dir; //!< Ray direction + tfar
+		float time; //!< Time of this ray for motion blur.
+		float tfar; //!< End of ray segment
+		unsigned int mask; //!< used to mask out objects during traversal
+		unsigned int id; //!< ray ID
+		unsigned int flags; //!< ray flags
+
+		Vector3 normal; //!< Not normalized geometry normal
+		float u; //!< Barycentric u coordinate of hit
+		float v; //!< Barycentric v coordinate of hit
+		unsigned int primID; //!< primitive ID
+		unsigned int geomID; //!< geometry ID
+		unsigned int instID; //!< instance ID
+	};
+
+	virtual bool intersect(Ray &p_ray) = 0;
+	virtual void intersect(Vector<Ray> &r_rays) = 0;
+
+	virtual void add_mesh(const PackedVector3Array &p_vertices, const PackedInt32Array &p_indices, unsigned int p_id) = 0;
+	virtual void commit() = 0;
+
+	virtual void set_mesh_filter(const HashSet<int> &p_mesh_ids) = 0;
+	virtual void clear_mesh_filter() = 0;
+
+	static Ref<StaticRaycaster> create();
+};