apps: add AssimpTest

apps/build.gradle

@@ -6,6 +6,9 @@ plugins {
 
 // tasks to run specific apps:
 
+tasks.register('AssimpTest', JavaExec) {
+    mainClass = 'com.github.stephengold.vsport.test.AssimpTest'
+}
 tasks.register('HelloVSport', JavaExec) {
     mainClass = 'com.github.stephengold.vsport.test.HelloVSport'
 }

apps/src/main/java/com/github/stephengold/vsport/test/AssimpTest.java

@@ -0,0 +1,126 @@
+/*
+ Copyright (c) 2023, Stephen Gold
+ All rights reserved.
+
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions are met:
+
+ 1. Redistributions of source code must retain the above copyright notice, this
+    list of conditions and the following disclaimer.
+
+ 2. Redistributions in binary form must reproduce the above copyright notice,
+    this list of conditions and the following disclaimer in the documentation
+    and/or other materials provided with the distribution.
+
+ 3. Neither the name of the copyright holder nor the names of its
+    contributors may be used to endorse or promote products derived from
+    this software without specific prior written permission.
+
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+package com.github.stephengold.vsport.test;
+
+import com.github.stephengold.vsport.AssimpUtils;
+import com.github.stephengold.vsport.BaseApplication;
+import com.github.stephengold.vsport.Camera;
+import com.github.stephengold.vsport.Geometry;
+import com.github.stephengold.vsport.Mesh;
+import com.github.stephengold.vsport.TextureKey;
+import com.github.stephengold.vsport.Vertex;
+import com.github.stephengold.vsport.input.CameraInputProcessor;
+import com.github.stephengold.vsport.input.RotateMode;
+import java.util.ArrayList;
+import java.util.List;
+import org.joml.Matrix3f;
+import org.joml.Matrix3fc;
+import org.joml.Vector3f;
+import org.joml.Vector3fc;
+
+/**
+ * Test loading a 3-D mesh using Assimp.
+ *
+ * @author Stephen Gold sgold@sonic.net
+ */
+public class AssimpTest extends BaseApplication {
+    // *************************************************************************
+    // constants
+
+    /**
+     * rotation matrix to transform Z-up coordinates to Y-up coordinates
+     */
+    final private static Matrix3fc zupToYup = new Matrix3f(
+            0f, 1f, 0f,
+            0f, 0f, 1f,
+            1f, 0f, 0f);
+    // *************************************************************************
+    // new methods exposed
+
+    /**
+     * Main entry point for the AssimpTest application.
+     *
+     * @param arguments the array of command-line arguments (not null)
+     */
+    public static void main(String[] arguments) {
+        AssimpTest application = new AssimpTest();
+        application.start();
+    }
+    // *************************************************************************
+    // BaseApplication methods
+
+    /**
+     * Callback invoked by V-Sport after the main update loop terminates.
+     */
+    @Override
+    public void cleanUp() {
+        // do nothing
+    }
+
+    /**
+     * Initialize the application.
+     */
+    @Override
+    public void initialize() {
+        // Load the viking_room model using Assimp:
+        String modelName = "/Models/viking_room/viking_room.obj";
+        int postFlags = 0x0;
+        List<Integer> indices = null;
+        List<Vertex> vertices = new ArrayList<>();
+        AssimpUtils.extractTriangles(modelName, postFlags, indices, vertices);
+
+        // The 3-D model is Z-up, but the camera is Y-up, so rotate each vertex:
+        for (Vertex v : vertices) {
+            v.rotate(zupToYup);
+        }
+
+        // De-duplicate the list of vertices as we create the mesh:
+        Mesh roomMesh = Mesh.newInstance(vertices);
+
+        TextureKey roomKey = new TextureKey(
+                "classpath:/Models/viking_room/viking_room.png");
+
+        Geometry room = new Geometry(roomMesh);
+        room.setProgram("Unshaded/Texture");
+        room.setTexture(roomKey);
+
+        // Configure the camera:
+        Camera camera = getCamera();
+        camera.setZClip(0.1f, 10f);
+
+        Vector3fc eye = new Vector3f(2f, 2f, 2f);
+        Vector3fc target = new Vector3f(0f, 0f, 0f);
+        camera.reposition(eye, target);
+
+        CameraInputProcessor cip = getCameraInputProcessor();
+        cip.setMoveSpeed(2f);
+        cip.setRotationMode(RotateMode.DragLMB);
+    }
+}

build.gradle

@@ -23,6 +23,10 @@ configurations.all {
     resolutionStrategy.cacheChangingModulesFor 0, 'seconds' // to disable caching of SNAPSHOTs
 }
 
+tasks.register('AssimpTest') {
+    dependsOn ':apps:AssimpTest'
+    description 'Runs the Assimp test app.'
+}
 tasks.register('HelloVSport') {
     dependsOn ':apps:HelloVSport'
     description 'Runs the HelloVSport tutorial app.'