public void onSurfaceChanged(GL10 gl, int w, int h) {
if (frameBuffer != null) frameBuffer.dispose();
frameBuffer = new FrameBuffer(gl, w, h);
// 載入模型
arch = loadModel("Arch.3DS", 15);
arch.compile();
box = loadModel("Box.3DS", 8);
box.compile();
cylinder = loadModel("Cylinder.3DS", 7);
cylinder.compile();
arch.setCollisionMode(Object3D.COLLISION_CHECK_OTHERS);
box.setCollisionMode(Object3D.COLLISION_CHECK_OTHERS);
cylinder.setCollisionMode(Object3D.COLLISION_CHECK_OTHERS);
arch.setName("Arch");
box.setName("Box");
cylinder.setName("Cylinder");
// 設定世界場景(加入3個模型)
world = new World();
world.setAmbientLight(75, 75, 75);
world.addObject(arch);
world.addObject(box);
world.addObject(cylinder);
box.translate(new SimpleVector(-15, -20, 5));
arch.translate(new SimpleVector(-15, 5, -5));
// 記錄原始位置
archOriginPosition = arch.getTranslation();
boxOriginPosition = box.getTranslation();
cylinderOriginPosition = cylinder.getTranslation();
// 設定Camera
Camera camera = world.getCamera();
camera.moveCamera(Camera.CAMERA_MOVEOUT, 50); // 向後移50
camera.lookAt(SimpleVector.ORIGIN); // 看向(0,0,0)
// 設定Light
sun = new Light(world);
sun.setIntensity(175, 175, 175);
sun.setPosition(camera.getPosition());
MemoryHelper.compact();
}
private void Handle3DControl(Object3D obj, float originZ) {
switch (Activity3Page.currentActionType) {
case Move:
// ---處理移動(Translate Position: X,Y)---begin
SimpleVector transPos =
new SimpleVector(
obj.getTranslation().x + deltaTranslatePositionX,
obj.getTranslation().y + deltaTranslatePositionY,
obj.getTranslation().z);
SimpleVector projectScreenV3 =
Interact2D.project3D2D(
world.getCamera(), frameBuffer, transPos); // (重要!!!)這可以知道3D物件在2D畫面的投影
if (projectScreenV3.x >= 0
&& projectScreenV3.y >= 0
&& projectScreenV3.x <= frameBuffer.getWidth()
&& projectScreenV3.y <= frameBuffer.getHeight()) {
obj.translate(deltaTranslatePositionX, deltaTranslatePositionY, 0);
}
deltaTranslatePositionX = 0;
deltaTranslatePositionY = 0;
// ---處理移動(Translate Position: X,Y)---end
// ---處理放大縮小(Scale)---begin
if (deltaScale != 0) {
float currentScale = obj.getScale() + deltaScale;
if (currentScale <= 0.5f) {
obj.setScale(0.5f);
} else if (currentScale >= 1.5f) {
obj.setScale(1.5f);
} else {
obj.setScale(currentScale);
}
deltaScale = 0;
}
// ---處理放大縮小(Scale)---end
break;
case Rotate:
// ---處理旋轉(Rotate)---begin
if (deltaRotateAngleX != 0) {
obj.rotateY(deltaRotateAngleX);
deltaRotateAngleX = 0;
}
if (deltaRotateAngleY != 0) {
obj.rotateX(deltaRotateAngleY);
deltaRotateAngleY = 0;
}
// ---處理旋轉(Rotate)---end
break;
case Depth:
// ---處理深度(Translate Depth: Z軸)---begin
float currentPosZ = obj.getTranslation().z + deltaTranslatePositionZ;
if (currentPosZ > originZ - ZaxisCanMoveDistance
&& currentPosZ < originZ + ZaxisCanMoveDistance) {
obj.translate(0, 0, deltaTranslatePositionZ);
}
deltaTranslatePositionZ = 0;
// ---處理深度(Translate Depth: Z軸)---end
break;
}
}