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framework/heightmap.h

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+/* Copyright (c) 2019-2021, Sascha Willems
+ *
+ * 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.
+ */
+
+#pragma once
+
+#include <ktx.h>
+#include <string>
+
+namespace vkb
+{
+/**
+ * @brief Class representing a heightmap loaded from a ktx texture
+ */
+class HeightMap
+{
+  public:
+	/**
+	 * @brief Loads in a ktx texture as a heightmap
+	 * @param filename The ktx file to load
+	 * @param patchsize The patch size
+	 */
+	HeightMap(const std::string &filename, const uint32_t patchsize);
+
+	~HeightMap();
+
+	/**
+	 * @brief Retrieves a value from the heightmap at a specific coordinates
+	 * @param x The x coordinate
+	 * @param y The y coordinate
+	 * @returns A float height value
+	 */
+	float get_height(const uint32_t x, const uint32_t y);
+
+  private:
+	uint16_t *data;
+
+	uint32_t dim;
+
+	uint32_t scale;
+};
+}        // namespace vkb