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public class Test implements EntryPoint{
/**
* The message displayed to the user when the server cannot be reached or
* returns an error.
*/
private static final String SERVER_ERROR = "An error occurred while "
+ "attempting to contact the server. Please check your network "
+ "connection and try again.";
/**
* Create a remote service proxy to talk to the server-side Greeting service.
*/
private final GreetingServiceAsync greetingService = GWT
.create(GreetingService.class);
private StaticMesh mesh;
private GL2 gl;
private Surface3D surface;
private LambertianShader shader;
private float posX =0, posY=0, posZ = 10;
private float yaw, yawRate;
private float pitch, pitchRate;
private float speed;
private final KeyboardManager keyboardManager = new KeyboardManager();
//private boolean MouseLeftClicked = false;
/**
* This is the entry point method.
*/
public void onModuleLoad() {
// Adds a canvas to the document.
surface = new Surface3D(500, 500);
surface.setPixelSize(500, 500);
RootPanel.get("section").add(surface);
keyboardManager.manage(surface);
keyboardManager.setPreventDefault(true);
gl = surface.getGL();
if (gl == null) {
Window.alert("No WebGL context found. Exiting.");
return;
}
// Sets up the GL context.
gl.clearColor(0.7f, 0.9f, 1.0f,1.0f);
gl.clearDepth(1);
gl.viewport(0, 0, surface.getWidth(), surface.getHeight());
gl.enable(EnableCap.DEPTH_TEST);
gl.depthFunc(DepthFunction.LEQUAL);
gl.clear(ClearBufferMask.COLOR_BUFFER_BIT, ClearBufferMask.DEPTH_BUFFER_BIT);
gl.enableVertexAttribArray(0);
// Creates a lambertian shader.
shader = new LambertianShader();
try {
shader.init(gl);
} catch (ShaderException e) {
Window.alert(e.getMessage());
return;
}
shader.bind();
mesh = new StaticMesh(gl, PrimitiveFactory.makeBox());
mesh.setPositionIndex(shader.getAttributePosition());
mesh.setNormalIndex(shader.getAttributeNormal());
mesh.setTexCoordIndex(-1);
shader.setDiffuseColor(.9f, .2f, .2f, 1f);
shader.setLightPosition(0, 0, 5);
PROJECTION.pushIdentity();
PROJECTION.perspective(30, 1, 1, 10000);
shader.setProjectionMatrix(PROJECTION.get());
PROJECTION.pop();
FpsTimer timer = new FpsTimer(60)
{
@Override
public void update()
{
Test.this.update();
}
};
timer.start();
}
public void update() {
handleKeys();
gl.clear(ClearBufferMask.COLOR_BUFFER_BIT, ClearBufferMask.DEPTH_BUFFER_BIT);
System.out.println("X = "+posX+" Y = "+posY+" Z = "+posZ+" AngleX = "+pitch+" AngleY = "+yaw);
MODELVIEW.push();
MODELVIEW.rotateX((float) Math.toRadians(-pitch));
MODELVIEW.rotateY((float) Math.toRadians(-yaw));
MODELVIEW.translate(-posX, -posY, -posZ);
mesh.draw();
drawTriangle(new Vector3f(0, 5, 0), new Vector3f(-5, -5, 0), new Vector3f(5, -5, 0));
shader.setModelViewMatrix(MODELVIEW.get());
MODELVIEW.pop();
float elapsed = 60f;
if (speed != 0) {
posX -= (float) (Math.sin(Math.toRadians(yaw)) * speed * elapsed);
posZ -= (float) (Math.cos(Math.toRadians(yaw)) * speed * elapsed);
}
yaw += yawRate * elapsed;
pitch += pitchRate * elapsed;
}
private void handleKeys() {
if (keyboardManager.isButtonDown(KeyCodes.KEY_PAGEUP)) {
pitchRate = 0.1f;
} else if (keyboardManager.isButtonDown(KeyCodes.KEY_PAGEDOWN)) {
pitchRate = -0.1f;
} else {
pitchRate = 0;
}
if (keyboardManager.isButtonDown(KeyCodes.KEY_LEFT)
|| keyboardManager.isButtonDown((int) 'Q')) {
yawRate = 0.05f;
} else if (keyboardManager.isButtonDown(KeyCodes.KEY_RIGHT)
|| keyboardManager.isButtonDown((int) 'D')) {
yawRate = -0.05f;
} else {
yawRate = 0;
}
if (keyboardManager.isButtonDown(KeyCodes.KEY_UP)
|| keyboardManager.isButtonDown((int) 'Z')) {
speed = 0.003f;
} else if (keyboardManager.isButtonDown(KeyCodes.KEY_DOWN)
|| keyboardManager.isButtonDown((int) 'S')) {
speed = -0.003f;
} else {
speed = 0;
}
}
private void drawTriangle(Vector3f p1,Vector3f p2,Vector3f p3)
{
WebGLBuffer triangleVetexPositionBuffer = gl.createBuffer();
gl.bindBuffer(BufferTarget.ARRAY_BUFFER, triangleVetexPositionBuffer);
float[] vertices = {p1.x,p1.y,p1.z,p2.x,p2.y,p2.z,p3.x,p3.y,p3.z};
gl.bufferData(BufferTarget.ARRAY_BUFFER, Float32Array.create(vertices), BufferUsage.STATIC_DRAW);
gl.vertexAttribPointer(0, 3, DataType.FLOAT, false, 0, 0);
gl.drawArrays(BeginMode.TRIANGLES, 0, 3);
}
} |
