我有一个小迷宫游戏。它看起来像这样：http://i.imgur.com/VEy54Lc.png
然而，我无法想象如何不允许相机移动框
这是代码：
public class EulerCameraTest extends GLGame {
//@Override
public Screen getStartScreen() {
return new EulerCameraScreen(this);
}
class EulerCameraScreen extends GLScreen {
Texture crateTexture;
Vertices3 cube;
PointLight light;
AmbientLight aLight;
EulerCamera camera;
Texture buttonTexture;
SpriteBatcher batcher;
Camera2D guiCamera;
TextureRegion buttonRegion;
Vector2 touchPos;
float lastX = -1;
float lastY = -1;
public EulerCameraScreen(Game game) {
super(game);
crateTexture = new Texture(glGame, "crate.png", true);
cube = createCube();
light = new PointLight();
light.setPosition(3, 3, -3);
aLight = new AmbientLight();
aLight.setColor(128, 128, 128, 255);
camera = new EulerCamera(67, glGraphics.getWidth() / (float)glGraphics.getHeight(), 0.1f, 100);
camera.getPosition().set(0, 0, 3);
buttonTexture = new Texture(glGame, "button.png");
batcher = new SpriteBatcher(glGraphics, 1);
guiCamera = new Camera2D(glGraphics, 480, 320);
buttonRegion = new TextureRegion(buttonTexture, 0, 0, 64, 64);
touchPos = new Vector2();
}
private Vertices3 createCube() {
float[] vertices = { -0.5f, -0.5f, 0.5f, 0, 1, 0, 0, 1,
0.5f, -0.5f, 0.5f, 1, 1, 0, 0, 1,
0.5f, 0.5f, 0.5f, 1, 0, 0, 0, 1,
-0.5f, 0.5f, 0.5f, 0, 0, 0, 0, 1,
0.5f, -0.5f, 0.5f, 0, 1, 1, 0, 0,
0.5f, -0.5f, -0.5f, 1, 1, 1, 0, 0,
0.5f, 0.5f, -0.5f, 1, 0, 1, 0, 0,
0.5f, 0.5f, 0.5f, 0, 0, 1, 0, 0,
0.5f, -0.5f, -0.5f, 0, 1, 0, 0, -1,
-0.5f, -0.5f, -0.5f, 1, 1, 0, 0, -1,
-0.5f, 0.5f, -0.5f, 1, 0, 0, 0, -1,
0.5f, 0.5f, -0.5f, 0, 0, 0, 0, -1,
-0.5f, -0.5f, -0.5f, 0, 1, -1, 0, 0,
-0.5f, -0.5f, 0.5f, 1, 1, -1, 0, 0,
-0.5f, 0.5f, 0.5f, 1, 0, -1, 0, 0,
-0.5f, 0.5f, -0.5f, 0, 0, -1, 0, 0,
-0.5f, 0.5f, 0.5f, 0, 1, 0, 1, 0,
0.5f, 0.5f, 0.5f, 1, 1, 0, 1, 0,
0.5f, 0.5f, -0.5f, 1, 0, 0, 1, 0,
-0.5f, 0.5f, -0.5f, 0, 0, 0, 1, 0,
-0.5f, -0.5f, -0.5f, 0, 1, 0, -1, 0,
0.5f, -0.5f, -0.5f, 1, 1, 0, -1, 0,
0.5f, -0.5f, 0.5f, 1, 0, 0, -1, 0,
-0.5f, -0.5f, 0.5f, 0, 0, 0, -1, 0 };
short[] indices = { 0, 1, 2, 2, 3, 0,
4, 5, 6, 6, 7, 4,
8, 9, 10, 10, 11, 8,
12, 13, 14, 14, 15, 12,
16, 17, 18, 18, 19, 16,
20, 21, 22, 22, 23, 20,
24, 25, 26, 26, 27, 24 };
Vertices3 cube = new Vertices3(glGraphics, vertices.length / 8, indices.length, false, true, true);
cube.setVertices(vertices, 0, vertices.length);
cube.setIndices(indices, 0, indices.length);
return cube;
}
//@Override
public void resume() {
crateTexture.reload();
}
//@Override
public void update(float deltaTime) {
game.getInput().getTouchEvents();
float x = game.getInput().getTouchX(0);
float y = game.getInput().getTouchY(0);
guiCamera.touchToWorld(touchPos.set(x, y));
if(game.getInput().isTouchDown(0)) {
if(touchPos.x < 64 && touchPos.y < 64) {
Vector3 direction = camera.getDirection();
direction.y = 0;
camera.getPosition().add(direction.mul(deltaTime));
} else {
if(lastX == -1) {
lastX = x;
lastY = y;
} else {
camera.rotate((x - lastX) / 10, (y - lastY) / 10);
lastX = x;
lastY = y;
}
}
} else {
lastX = -1;
lastY = -1;
}
}
//@Override
public void present(float deltaTime) {
GL10 gl = glGraphics.getGL();
gl.glClear(GL10.GL_COLOR_BUFFER_BIT | GL10.GL_DEPTH_BUFFER_BIT);
gl.glViewport(0, 0, glGraphics.getWidth(), glGraphics.getHeight());
camera.setMatrices(gl);
gl.glEnable(GL10.GL_DEPTH_TEST);
gl.glEnable(GL10.GL_TEXTURE_2D);
gl.glEnable(GL10.GL_LIGHTING);
crateTexture.bind();
cube.bind();
light.enable(gl, GL10.GL_LIGHT0);
aLight.enable(gl);
int[] matrix = new int[]
{0,0,0,1,0,
0,1,1,1,0,
0,1,0,0,0
};
int step = 0;
for(int z = 0; z >= -4/2; z-=2/2)
{
for(int x = -4/2; x <=4/2; x+=2/2 )
{
if(matrix[step++] == 1)
continue;
gl.glPushMatrix();
gl.glTranslatef(x, 0, z);
cube.draw(GL10.GL_TRIANGLES, 0, 6 * 2 * 3);
gl.glPopMatrix();
}
}
cube.unbind();
gl.glDisable(GL10.GL_LIGHTING);
gl.glDisable(GL10.GL_DEPTH_TEST);
gl.glEnable(GL10.GL_BLEND);
gl.glBlendFunc(GL10.GL_SRC_ALPHA, GL10.GL_ONE_MINUS_SRC_ALPHA);
guiCamera.setViewportAndMatrices();
batcher.beginBatch(buttonTexture);
batcher.drawSprite(32, 32, 64, 64, buttonRegion);
batcher.endBatch();
gl.glDisable(GL10.GL_BLEND);
gl.glDisable(GL10.GL_TEXTURE_2D);
}
}
}
我相信now（）方法是我应该查看的地方。有没有人知道如何让相机无法通过盒子走路？
答案 0 :(得分：0)
我相信update(float deltaTime)是您应该关注的地方。如果相机不应该通过盒子，那么你不应该在打开盒子时移动它。您需要创建一个良好的系统来控制场景周围的移动，并可能将某些值转换为场景坐标系。更一般地说，你应该将物理引擎与图形引擎分开。
考虑您有一个代表您的场景的对象，并且包含以下数据：
int width; // The width of the scene
int height; // The height of the scene
bool boxes[width][height]; // The grid of boxes. If the segment is true then a box should be drawn
float playerPositionX;
float playerPositionY;
现在你的绘制方法看起来像：
for(int x = 0; x < scene.width; x++)
{
for(int y = 0; y < scene.height; y++)
{
if(!scene.boxes[y][x])
continue;
gl.glPushMatrix();
gl.glTranslatef(x*sceneScale, 0, y*sceneScale); // Scene scale is just some constant to make things as large as you want (a box size most likely in your case).
cube.draw(GL10.GL_TRIANGLES, 0, 6 * 2 * 3);
gl.glPopMatrix();
}
}
但是在你的update方法上，你宁愿简单地称之为：
scene.movePlayer(x, y);
所以场景有一个方法
public void movePlayer(float x, float y) {
// first get the current position indices:
int previousX = (int)playerPositionX;
int previousY = (int)playerPositionY;
// And the target position:
int targetX = (int)(playerPositionX+x);
int targetY = (int)(playerPositionY+y);
// Now check if you have collisions
if(targetX < 0 || targetX >= width || boxes[targetX][previousY]) { // The previousY is NOT a bug
// We hit the wall in X direction so do not move it
x = .0f;
}
if(targetY < 0 || targetY >= height || boxes[previousX][targetY]) { // The previousX is NOT a bug
// We hit the wall in Y direction so do not move it
y = .0f;
}
playerPositionX += x;
playerPositionY += y;
}
现在你需要在update中做的就是根据场景播放器的位置设置相机位置（再次应用你需要的任何因素，如场景比例）。