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| import javax.media.opengl.GL;
import javax.media.opengl.GLAutoDrawable;
import javax.media.opengl.GLEventListener;
import javax.media.opengl.GLJPanel;
import javax.media.opengl.glu.GLU;
import javax.swing.JFrame;
public class ScissorTest extends JFrame implements GLEventListener
{
private final int H_TIME_SCALE = 20;
private final int H_TIME_SCROLL = 10;
private final int W_TRACK_SCROLL = 10;
private final int W_TRACK_HEADER = 100;
private final int TK_NUMBER = 10;
private float[] bgColor = {1,1,1,1};
private int width;
private int height;
private GLJPanel glp;
private GL gl;
private GLU glu;
private float minY = 0;
private float maxY = 20;
private float minX = 0;
private float maxX = 2000;
public ScissorTest()
{
super("ScissorTest");
setSize(400,400);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
glp = new GLJPanel();
glp.addGLEventListener(this);
add(glp);
setVisible(true);
}
public void init(GLAutoDrawable drawable)
{
gl = drawable.getGL();
glu = new GLU();
gl.glShadeModel(GL.GL_SMOOTH); gl.glClearColor(bgColor[0],bgColor[1],bgColor[2],bgColor[3]); gl.glViewport(0, 0, width, height);
gl.glEnable(GL.GL_POINT_SMOOTH);
gl.glEnable(GL.GL_LINE_SMOOTH);
gl.glEnable(GL.GL_POLYGON_SMOOTH);
gl.glPolygonMode(GL.GL_FRONT, GL.GL_LINE);
gl.glEnable(GL.GL_BLEND);
gl.glBlendFunc(GL.GL_SRC_ALPHA, GL.GL_ONE_MINUS_SRC_ALPHA);
gl.glMatrixMode(GL.GL_PROJECTION);
gl.glEnable(GL.GL_SCISSOR_TEST);
}
public void display(GLAutoDrawable drawable)
{
gl = drawable.getGL();
gl.glClear(GL.GL_COLOR_BUFFER_BIT);
gl.glLoadIdentity();
gl.glPolygonMode(GL.GL_FRONT, GL.GL_FILL);
gl.glViewport(W_TRACK_HEADER,height-H_TIME_SCALE,width-W_TRACK_HEADER-W_TRACK_SCROLL,H_TIME_SCALE);
gl.glScissor(W_TRACK_HEADER,height-H_TIME_SCALE,width-W_TRACK_HEADER-W_TRACK_SCROLL,H_TIME_SCALE);
glu.gluOrtho2D(0,1,0,1);
gl.glColor3f(1,0,0);
gl.glRectf(0,0,1,1);
gl.glViewport(0,H_TIME_SCROLL,W_TRACK_HEADER,height-H_TIME_SCROLL-H_TIME_SCALE);
gl.glScissor(0,H_TIME_SCROLL,W_TRACK_HEADER,height-H_TIME_SCROLL-H_TIME_SCALE);
glu.gluOrtho2D(0,1,0,1);
gl.glColor3f(0,1,0);
gl.glRectf(0,0,1,1);
gl.glViewport(width-W_TRACK_SCROLL,H_TIME_SCROLL,W_TRACK_SCROLL,height-H_TIME_SCROLL-H_TIME_SCALE);
gl.glScissor(width-W_TRACK_SCROLL,H_TIME_SCROLL,W_TRACK_SCROLL,height-H_TIME_SCROLL-H_TIME_SCALE);
glu.gluOrtho2D(0,1,0,1);
gl.glColor3f(0,0,1);
gl.glRectf(0,0,1,1);
gl.glViewport(W_TRACK_HEADER,0,width-W_TRACK_HEADER-W_TRACK_SCROLL,H_TIME_SCROLL);
gl.glScissor(W_TRACK_HEADER,0,width-W_TRACK_HEADER-W_TRACK_SCROLL,H_TIME_SCROLL);
glu.gluOrtho2D(0,1,0,1);
gl.glColor3f(0.5f,0.5f,0);
gl.glRectf(0,0,1,1);
int trackHeight = (height-H_TIME_SCALE-H_TIME_SCROLL)/TK_NUMBER;
gl.glColor3f(0,0,0);
int currentHeight = 0;
for(int i = TK_NUMBER ; i >= 0 ; i--)
{
gl.glViewport(W_TRACK_HEADER,H_TIME_SCROLL+currentHeight,width-W_TRACK_HEADER-W_TRACK_SCROLL,trackHeight);
gl.glScissor(W_TRACK_HEADER,H_TIME_SCROLL+currentHeight,width-W_TRACK_HEADER-W_TRACK_SCROLL,trackHeight);
glu.gluOrtho2D(minX,maxX,minY,maxY);
gl.glBegin(GL.GL_LINES);
gl.glVertex2f(minX,minY);
gl.glVertex2f(maxX,maxY);
gl.glEnd();
currentHeight += trackHeight;
}
}
public void reshape(GLAutoDrawable drawable, int x, int y, int w, int h)
{
width = w;
height = h;
}
public void displayChanged(GLAutoDrawable drawable, boolean modeChanged, boolean deviceChanged){}
public static void main(String args[])
{
new ScissorTest();
}
} |
