返信ありがとうございます。以下は、さまざまな Android 関連の問題を考慮して、テクスチャのない Java/Windows バージョンです。提案どおりに Move() を修正しましたが、スプライトはまだぎくしゃくしています。結局、それはたった 1 クワッドであり、非常に計算量が多いわけではありません。
import java.awt.Frame;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.FloatBuffer;
import javax.media.opengl.GL2;
import javax.media.opengl.GLAutoDrawable;
import javax.media.opengl.GLEventListener;
import javax.media.opengl.awt.GLCanvas;
import javax.media.opengl.fixedfunc.GLMatrixFunc;
import javax.media.opengl.glu.GLU;
import com.jogamp.opengl.util.Animator;
public class Practice implements GLEventListener, MouseMotionListener {
static GLCanvas canvas = new GLCanvas();
static Animator anim = new Animator(canvas);
static Frame frame = new Frame();
private GLU glu;
private FloatBuffer vertBuff;
private ByteBuffer indBuff;
private static float[] color = new float[]{1,1,1,1};
private static float xpos;
private static float vel = 100f;
private static long lastTime = -1;
@Override
public void display(GLAutoDrawable drawable) {
GL2 gl = drawable.getGL().getGL2();
gl.glClear(GL2.GL_COLOR_BUFFER_BIT | GL2.GL_DEPTH_BUFFER_BIT);
gl.glEnableClientState(GL2.GL_VERTEX_ARRAY);
gl.glVertexPointer(3,GL2.GL_FLOAT,0,vertBuff);
gl.glMatrixMode(GLMatrixFunc.GL_MODELVIEW);
gl.glLoadIdentity();
gl.glColor4fv(color,0);
Move(gl);
gl.glDrawElements(GL2.GL_TRIANGLES,6,GL2.GL_UNSIGNED_BYTE,indBuff);
}
private void Move(GL2 gl){
long time = System.currentTimeMillis();
long timeStep = 0;
if(lastTime != -1){
timeStep = time - lastTime;
}
if(timeStep < 20){
try {Thread.sleep(20-timeStep);} catch (InterruptedException e) {e.printStackTrace();}
}
lastTime = time;
xpos += vel * timeStep/1000f;
if(xpos>500){
xpos = 500;
vel *= -1;
}
if(xpos<-500){
xpos = -500;
vel *= -1;
}
gl.glTranslatef(xpos,0.0f,0.0f);
gl.glScalef(50.0f,50.0f,1.0f);
}
@Override
public void dispose(GLAutoDrawable arg0) {
// TODO Auto-generated method stub
}
@Override
public void init(GLAutoDrawable drawable) {
GL2 gl = drawable.getGL().getGL2();
gl.glClearColor(0,0,0,1);
glu = new GLU();
float[] verts = {
-0.5f, -0.5f, -1.0f,
0.5f, -0.5f, -1.0f,
0.5f, 0.5f, -1.0f,
-0.5f, 0.5f, -1.0f
};
byte[] inds = {
0,1,3, 1,2,3
};
ByteBuffer bb = ByteBuffer.allocateDirect(48);
bb.order(ByteOrder.nativeOrder());
vertBuff = bb.asFloatBuffer();
vertBuff.put(verts);
vertBuff.position(0);
indBuff = ByteBuffer.allocateDirect(6);
indBuff.order(ByteOrder.nativeOrder());
indBuff.put(inds);
indBuff.position(0);
}
@Override
public void reshape(GLAutoDrawable drawable, int x, int y, int width,
int height) {
GL2 gl = drawable.getGL().getGL2();
if(height <=0)height=1;
float aspect = (float)width/height;
gl.glMatrixMode(GLMatrixFunc.GL_PROJECTION);
gl.glLoadIdentity();
float[] ortho = {
(float)1/width,0,0,0,
0,(float)1/width*aspect,0,0,
0,0,1,0,
0,0,0,1
};
//gl.glLoadMatrixf(ortho,0);
glu.gluOrtho2D(-width,width,-height,height);
}
@Override
public void mouseDragged(MouseEvent e) {
// TODO Auto-generated method stub
}
@Override
public void mouseMoved(MouseEvent e) {
// TODO Auto-generated method stub
float R = (float)1/frame.getWidth()*e.getX();
float B = (float)1/frame.getHeight()*e.getY();
color = new float[]{R,.2f,B,1.0f};
}
public static void close(){
anim.stop();
frame.dispose();
System.exit(0);
}
public static void main(String[] args) {
canvas.addGLEventListener(new Practice());
canvas.addMouseMotionListener(new Practice());
frame.add(canvas);
frame.setSize(500,300);
frame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e){
close();
};
});
frame.setVisible(true);
anim.start();
canvas.requestFocus();
}
}