init

framework/scene_graph/components/aabb.cpp

@@ -0,0 +1,111 @@
+/* Copyright (c) 2018-2024, Arm Limited and Contributors
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * 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.
+ */
+
+#include "aabb.h"
+
+#include "core/util/logging.hpp"
+
+namespace vkb
+{
+namespace sg
+{
+AABB::AABB()
+{
+	reset();
+}
+
+AABB::AABB(const glm::vec3 &min, const glm::vec3 &max) :
+    min{min},
+    max{max}
+{
+}
+
+std::type_index AABB::get_type()
+{
+	return typeid(AABB);
+}
+
+void AABB::update(const glm::vec3 &point)
+{
+	min = glm::min(min, point);
+	max = glm::max(max, point);
+}
+
+void AABB::update(const std::vector<glm::vec3> &vertex_data, const std::vector<uint16_t> &index_data)
+{
+	// Check if submesh is indexed
+	if (index_data.size() > 0)
+	{
+		// Update bounding box for each indexed vertex
+		for (size_t index_id = 0; index_id < index_data.size(); index_id++)
+		{
+			update(vertex_data[index_data[index_id]]);
+		}
+	}
+	else
+	{
+		// Update bounding box for each vertex
+		for (size_t vertex_id = 0; vertex_id < vertex_data.size(); vertex_id++)
+		{
+			update(vertex_data[vertex_id]);
+		}
+	}
+}
+
+void AABB::transform(glm::mat4 &transform)
+{
+	min = max = glm::vec4(min, 1.0f) * transform;
+
+	// Update bounding box for the remaining 7 corners of the box
+	update(glm::vec4(min.x, min.y, max.z, 1.0f) * transform);
+	update(glm::vec4(min.x, max.y, min.z, 1.0f) * transform);
+	update(glm::vec4(min.x, max.y, max.z, 1.0f) * transform);
+	update(glm::vec4(max.x, min.y, min.z, 1.0f) * transform);
+	update(glm::vec4(max.x, min.y, max.z, 1.0f) * transform);
+	update(glm::vec4(max.x, max.y, min.z, 1.0f) * transform);
+	update(glm::vec4(max, 1.0f) * transform);
+}
+
+glm::vec3 AABB::get_scale() const
+{
+	return (max - min);
+}
+
+glm::vec3 AABB::get_center() const
+{
+	return (min + max) * 0.5f;
+}
+
+glm::vec3 AABB::get_min() const
+{
+	return min;
+}
+
+glm::vec3 AABB::get_max() const
+{
+	return max;
+}
+
+void AABB::reset()
+{
+	min = std::numeric_limits<glm::vec3>::max();
+
+	max = std::numeric_limits<glm::vec3>::min();
+}
+
+}        // namespace sg
+}        // namespace vkb