+ * If successful, just one set of grid diagonals will be visible. If + * unsuccessful, you'll see both green diagonals (the TerrainQuad) and + * perpendicular blue diagonals (physics debug). + *
+ * Use this test with jme3-bullet only; it can yield false success with + * jme3-jbullet due to JME issue #1129. + * + * @author Stephen Gold sgold@sonic.net + */ +public class TestIssue1125 extends SimpleApplication { + // ************************************************************************* + // constants and loggers + + /** + * message logger for this class + */ + final public static Logger logger + = Logger.getLogger(TestIssue1125.class.getName()); + // ************************************************************************* + // fields + + /** + * height array for a small heightfield + */ + final private float[] nineHeights = new float[9]; + /** + * green wireframe material for the TerrainQuad + */ + private Material quadMaterial; + /** + * space for physics simulation + */ + private PhysicsSpace physicsSpace; + // ************************************************************************* + // new methods exposed + + /** + * Main entry point for the TestIssue1125 application. + * + * @param ignored array of command-line arguments (not null) + */ + public static void main(String[] ignored) { + new TestIssue1125().start(); + } + // ************************************************************************* + // SimpleApplication methods + + /** + * Initialize this application. + */ + @Override + public void simpleInitApp() { + configureCamera(); + configureMaterials(); + viewPort.setBackgroundColor(new ColorRGBA(0.5f, 0.2f, 0.2f, 1f)); + configurePhysics(); + initializeHeightData(); + addTerrain(); + showHints(); + } + // ************************************************************************* + // private methods + + /** + * Add 3x3 terrain to the scene and the PhysicsSpace. + */ + private void addTerrain() { + int patchSize = 3; + int mapSize = 3; + TerrainQuad quad + = new TerrainQuad("terrain", patchSize, mapSize, nineHeights); + rootNode.attachChild(quad); + quad.setMaterial(quadMaterial); + + CollisionShape shape = CollisionShapeFactory.createMeshShape(quad); + float massForStatic = 0f; + RigidBodyControl rbc = new RigidBodyControl(shape, massForStatic); + rbc.setPhysicsSpace(physicsSpace); + quad.addControl(rbc); + } + + /** + * Configure the camera during startup. + */ + private void configureCamera() { + float fHeight = cam.getFrustumTop() - cam.getFrustumBottom(); + float fWidth = cam.getFrustumRight() - cam.getFrustumLeft(); + float fAspect = fWidth / fHeight; + float yDegrees = 45f; + float near = 0.02f; + float far = 20f; + cam.setFrustumPerspective(yDegrees, fAspect, near, far); + + flyCam.setMoveSpeed(5f); + + cam.setLocation(new Vector3f(2f, 4.7f, 0.4f)); + cam.setRotation(new Quaternion(0.348f, -0.64f, 0.4f, 0.556f)); + } + + /** + * Configure materials during startup. + */ + private void configureMaterials() { + quadMaterial = new Material(assetManager, + "Common/MatDefs/Misc/Unshaded.j3md"); + quadMaterial.setColor("Color", ColorRGBA.Green.clone()); + RenderState ars = quadMaterial.getAdditionalRenderState(); + ars.setWireframe(true); + } + + /** + * Configure physics during startup. + */ + private void configurePhysics() { + BulletAppState bulletAppState = new BulletAppState(); + stateManager.attach(bulletAppState); + bulletAppState.setDebugEnabled(true); + physicsSpace = bulletAppState.getPhysicsSpace(); + } + + /** + * Initialize the height data during startup. + */ + private void initializeHeightData() { + nineHeights[0] = 1f; + nineHeights[1] = 0f; + nineHeights[2] = 1f; + nineHeights[3] = 0f; + nineHeights[4] = 0.5f; + nineHeights[5] = 0f; + nineHeights[6] = 1f; + nineHeights[7] = 0f; + nineHeights[8] = 1f; + } + + private void showHints() { + guiFont = assetManager.loadFont("Interface/Fonts/Default.fnt"); + int numLines = 3; + BitmapText lines[] = new BitmapText[numLines]; + for (int i = 0; i < numLines; ++i) { + lines[i] = new BitmapText(guiFont); + } + + String p = "Test for jMonkeyEngine issue #1125"; + if (isNativeBullet()) { + lines[0].setText(p + " with native Bullet"); + } else { + lines[0].setText(p + " with JBullet (may yield false success)"); + } + lines[1].setText("Use W/A/S/D/Q/Z/arrow keys to move the camera."); + lines[2].setText("F5: render stats, C: camera pos, M: mem stats"); + + float textHeight = guiFont.getCharSet().getLineHeight(); + float viewHeight = cam.getHeight(); + float viewWidth = cam.getWidth(); + for (int i = 0; i < numLines; ++i) { + float left = Math.round((viewWidth - lines[i].getLineWidth()) / 2f); + float top = viewHeight - i * textHeight; + lines[i].setLocalTranslation(left, top, 0f); + guiNode.attachChild(lines[i]); + } + } + + /** + * Determine which physics library is in use. + * + * @return true for C++ Bullet, false for JBullet (jme3-jbullet) + */ + private boolean isNativeBullet() { + try { + Class clazz = Class.forName("com.jme3.bullet.util.NativeMeshUtil"); + return clazz != null; + } catch (ClassNotFoundException exception) { + return false; + } + } +}