Fastest pixel blitting renderer being created in Java. 3D renderer. For educational purposes and most importantly, FUN
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SigRenderer2/src/sig/Panel.java

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package sig;
import javax.swing.JPanel;
import sig.utils.DrawUtils;
import java.awt.Graphics;
import java.awt.Color;
import java.awt.Image;
import java.awt.image.MemoryImageSource;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.concurrent.ConcurrentLinkedQueue;
import java.awt.image.ColorModel;
import java.awt.GraphicsEnvironment;
import java.awt.GraphicsConfiguration;
import java.awt.Toolkit;
import java.util.Queue;
public class Panel extends JPanel implements Runnable {
long startTime = System.nanoTime();
long endTime = System.nanoTime();
public int pixel[];
public int width=SigRenderer.SCREEN_WIDTH;
public int height=SigRenderer.SCREEN_HEIGHT;
private Image imageBuffer;
private MemoryImageSource mImageProducer;
private ColorModel cm;
private Thread thread;
Thread workerThread;
List<Triangle> accumulatedTris = new ArrayList<Triangle>();
public static ConcurrentLinkedQueue<Triangle> accumulatedTris1 = new ConcurrentLinkedQueue<>();
public static ConcurrentLinkedQueue<Triangle> accumulatedTris2 = new ConcurrentLinkedQueue<>();
boolean renderFirst=false;
boolean lastRender=renderFirst;
boolean renderNeeded=false;
long profileStartTime;
public Panel() {
super(true);
thread = new Thread(this, "MyPanel Thread");
}
/**
* Get Best Color model available for current screen.
* @return color model
*/
protected static ColorModel getCompatibleColorModel(){
GraphicsConfiguration gfx_config = GraphicsEnvironment.
getLocalGraphicsEnvironment().getDefaultScreenDevice().
getDefaultConfiguration();
return gfx_config.getColorModel();
}
/**
* Call it after been visible and after resizes.
*/
public void init(){
cm = getCompatibleColorModel();
width = getWidth();
height = getHeight();
SigRenderer.SCREEN_WIDTH=getWidth();
SigRenderer.SCREEN_HEIGHT=getHeight();
int screenSize = width * height;
if(pixel == null || pixel.length < screenSize){
pixel = new int[screenSize];
}
mImageProducer = new MemoryImageSource(width, height, cm, pixel,0, width);
mImageProducer.setAnimated(true);
mImageProducer.setFullBufferUpdates(true);
imageBuffer = Toolkit.getDefaultToolkit().createImage(mImageProducer);
if(thread.isInterrupted() || !thread.isAlive()){
thread.start();
}
SigRenderer.depthBuffer = new float[width*height];
SigRenderer.depthBuffer_tri = new Triangle[width*height];
SigRenderer.translucencyBuffer = new boolean[width*height];
SigRenderer.depthBuffer_noTransparency = new float[width*height];
}
/**
* Do your draws in here !!
* pixel is your canvas!
*/
public /* abstract */ void render(){
int[] p = pixel; // this avoid crash when resizing
//a=h/w
if (SigRenderer.PROFILING) {
profileStartTime = System.currentTimeMillis();
}
final int h=SigRenderer.SCREEN_HEIGHT;
if(p.length != width * height) return;
for (int x=0;x<width;x++) {
for (int y=0;y<height;y++) {
p[ (int)(x*SigRenderer.RESOLUTION) + (int)(y*SigRenderer.RESOLUTION) * width] = 0;
SigRenderer.depthBuffer[x+y*width]=0;
SigRenderer.depthBuffer_tri[x+y*width]=null;
SigRenderer.translucencyBuffer[x+y*width]=false;
SigRenderer.depthBuffer_noTransparency[x+y*width]=0;
}
}
//accumulatedTris2.clear();
//Matrix matRotZ = Matrix.MakeRotationZ(fTheta*0.5f),matRotX = Matrix.MakeRotationX(fTheta);
Matrix matRotZ = Matrix.IDENTITY;
Matrix matRotX = Matrix.IDENTITY;
Matrix matTranslation = Matrix.MakeTranslation(0,0,0);
Matrix matWorld = Matrix.IDENTITY;
matWorld = Matrix.MultiplyMatrix(matRotZ,matRotX);
matWorld = Matrix.MultiplyMatrix(matWorld,matTranslation);
Vector vUp = new Vector(0,1,0);
Vector vTarget = new Vector(0,(float)Math.sin(SigRenderer.pitch),(float)Math.cos(SigRenderer.pitch));
Matrix matCameraRot = Matrix.MakeRotationY(SigRenderer.yaw);
SigRenderer.vLookDir = Matrix.MultiplyVector(matCameraRot,vTarget);
vTarget = Vector.add(Vector.add(SigRenderer.vCamera,SigRenderer.vCameraOffset),SigRenderer.vLookDir);
Matrix matCamera = Matrix.PointAt(Vector.add(SigRenderer.vCamera,SigRenderer.vCameraOffset), vTarget, vUp);
Matrix matView = Matrix.QuickInverse(matCamera);
if (workerThread==null||(!workerThread.isAlive()&&renderNeeded)) {
renderFirst=!renderFirst;
final Matrix matWorld2 = matWorld;
workerThread = new Thread() {
@Override
public void run() {
ConcurrentLinkedQueue<Triangle> newTris = new ConcurrentLinkedQueue<>();
for (String key : SigRenderer.blockGrid.keySet()) {
Block b = SigRenderer.blockGrid.get(key);
for (Triangle t : b.block.prepareRender(b)) {
prepareTriForRender(matWorld2, matView, t, newTris);
}
}
if (renderFirst) {
accumulatedTris2.clear();
accumulatedTris2.addAll(newTris);
} else {
accumulatedTris1.clear();
accumulatedTris1.addAll(newTris);
}
renderNeeded=false;
}
};
workerThread.start();
}
if (SigRenderer.PROFILING) {
System.out.println((System.currentTimeMillis()-profileStartTime)+"ms");profileStartTime=System.currentTimeMillis();
}
/*Collections.sort(accumulatedTris, new Comparator<Triangle>() {
@Override
public int compare(Triangle t1, Triangle t2) {
float z1=(t1.A.z+t1.B.z+t1.C.z)/3f;
float z2=(t2.A.z+t2.B.z+t2.C.z)/3f;
return (z1<z2)?1:(z1==z2)?0:-1;
}
});*/
SigRenderer.tempAnswer=null;
long totalTime=0;
long startTime2=0;
Collection<Triangle> currentRender = (renderFirst)?accumulatedTris1:accumulatedTris2;
List<Triangle> newTris = new ArrayList<>();
for (Triangle t:currentRender) {
prepareTriForRender(matWorld, matView, t.unmodifiedTri, newTris, true);
}
currentRender=newTris;
for (Triangle t : currentRender) {
Triangle[] clipped = new Triangle[]{new Triangle(),new Triangle()};
List<Triangle> triList = new ArrayList<>();
triList.add(t);
int newTriangles=1;
for (int pl=0;pl<4;pl++) {
int trisToAdd=0;
while (newTriangles>0) {
clipped = new Triangle[]{new Triangle(),new Triangle()};
Triangle test = triList.remove(0);
newTriangles--;
switch (pl) {
case 0:{trisToAdd = Triangle.ClipAgainstPlane(new Vector(0,0,0),new Vector(0,1,0),test,clipped);}break;
case 1:{trisToAdd = Triangle.ClipAgainstPlane(new Vector(0,getHeight()-1f,0),new Vector(0,-1,0),test,clipped);}break;
case 2:{trisToAdd = Triangle.ClipAgainstPlane(new Vector(0,0,0),new Vector(1,0,0),test,clipped);}break;
case 3:{trisToAdd = Triangle.ClipAgainstPlane(new Vector(getWidth()-1f,0,0),new Vector(-1,0,0),test,clipped);}break;
}
for (int w=0;w<trisToAdd;w++) {
triList.add(clipped[w]);
}
}
newTriangles=triList.size();
}
if (SigRenderer.PROFILING) {
startTime2 = System.nanoTime();
}
for (Triangle tt : triList) {
if (tt.tex!=null) {
if (renderFirst) {
tt.unmodifiedTri.nextRenderTime=System.currentTimeMillis()+50;
} else {
tt.unmodifiedTri.nextRenderTime2=System.currentTimeMillis()+50;
}
SigRenderer.temp_request=SigRenderer.request;
DrawUtils.TexturedTriangle(p,
(int)tt.A.x,(int)tt.A.y,tt.T.u,tt.T.v,tt.T.w,
(int)tt.B.x,(int)tt.B.y,tt.U.u,tt.U.v,tt.U.w,
(int)tt.C.x,(int)tt.C.y,tt.V.u,tt.V.v,tt.V.w,
tt.tex,(tt.col&0xFF0000)>>16,tt);
} else {
DrawUtils.FillTriangle(p,(int)tt.A.x,(int)tt.A.y,(int)tt.B.x,(int)tt.B.y,(int)tt.C.x,(int)tt.C.y,tt.getColor());
}
if (SigRenderer.WIREFRAME) {
DrawUtils.DrawTriangle(p,(int)tt.A.x,(int)tt.A.y,(int)tt.B.x,(int)tt.B.y,(int)tt.C.x,(int)tt.C.y,Color.WHITE.getRGB());
}
}
if (SigRenderer.PROFILING) {
totalTime+=System.nanoTime()-startTime2;
}
}
renderNeeded=true;
boolean translucencyDetected=false;
for (int x=0;x<SigRenderer.SCREEN_WIDTH;x++) {
for (int y=0;y<SigRenderer.SCREEN_HEIGHT;y++) {
if (SigRenderer.translucencyBuffer[x+y*SigRenderer.SCREEN_WIDTH]) {
translucencyDetected=true;
SigRenderer.depthBuffer[x+y*SigRenderer.SCREEN_WIDTH]=0;
//SigRenderer.depthBuffer_tri[x+y*SigRenderer.SCREEN_WIDTH]=null;
}
Triangle t = SigRenderer.depthBuffer_tri[x+y*SigRenderer.SCREEN_WIDTH];
if (t!=null) {
t.nextRenderTime=t.nextRenderTime2=-1;
}
}
}
if (translucencyDetected) {
Collections.sort((ArrayList<Triangle>)currentRender, new Comparator<Triangle>() {
@Override
public int compare(Triangle t1, Triangle t2) {
float z1=(t1.A.z+t1.B.z+t1.C.z)/3f;
float z2=(t2.A.z+t2.B.z+t2.C.z)/3f;
return (z1<z2)?1:(z1==z2)?0:-1;
}
});
for (Triangle t : currentRender) {
Triangle[] clipped = new Triangle[]{new Triangle(),new Triangle()};
List<Triangle> triList = new ArrayList<>();
triList.add(t);
int newTriangles=1;
for (int pl=0;pl<4;pl++) {
int trisToAdd=0;
while (newTriangles>0) {
clipped = new Triangle[]{new Triangle(),new Triangle()};
Triangle test = triList.remove(0);
newTriangles--;
switch (pl) {
case 0:{trisToAdd = Triangle.ClipAgainstPlane(new Vector(0,0,0),new Vector(0,1,0),test,clipped);}break;
case 1:{trisToAdd = Triangle.ClipAgainstPlane(new Vector(0,getHeight()-1f,0),new Vector(0,-1,0),test,clipped);}break;
case 2:{trisToAdd = Triangle.ClipAgainstPlane(new Vector(0,0,0),new Vector(1,0,0),test,clipped);}break;
case 3:{trisToAdd = Triangle.ClipAgainstPlane(new Vector(getWidth()-1f,0,0),new Vector(-1,0,0),test,clipped);}break;
}
for (int w=0;w<trisToAdd;w++) {
triList.add(clipped[w]);
}
}
newTriangles=triList.size();
}
if (SigRenderer.PROFILING) {
startTime2 = System.nanoTime();
}
for (Triangle tt : triList) {
if (tt.tex!=null) {
DrawUtils.TexturedTriangle(p,
(int)tt.A.x,(int)tt.A.y,tt.T.u,tt.T.v,tt.T.w,
(int)tt.B.x,(int)tt.B.y,tt.U.u,tt.U.v,tt.U.w,
(int)tt.C.x,(int)tt.C.y,tt.V.u,tt.V.v,tt.V.w,
tt.tex,(tt.col&0xFF0000)>>16,tt,DrawUtils.IGNORE_TRANSLUCENT_RENDERING);
} else {
DrawUtils.FillTriangle(p,(int)tt.A.x,(int)tt.A.y,(int)tt.B.x,(int)tt.B.y,(int)tt.C.x,(int)tt.C.y,tt.getColor());
}
if (SigRenderer.WIREFRAME) {
DrawUtils.DrawTriangle(p,(int)tt.A.x,(int)tt.A.y,(int)tt.B.x,(int)tt.B.y,(int)tt.C.x,(int)tt.C.y,Color.WHITE.getRGB());
}
}
if (SigRenderer.PROFILING) {
totalTime+=System.nanoTime()-startTime2;
}
}
for (Triangle t : currentRender) {
Triangle[] clipped = new Triangle[]{new Triangle(),new Triangle()};
List<Triangle> triList = new ArrayList<>();
triList.add(t);
int newTriangles=1;
for (int pl=0;pl<4;pl++) {
int trisToAdd=0;
while (newTriangles>0) {
clipped = new Triangle[]{new Triangle(),new Triangle()};
Triangle test = triList.remove(0);
newTriangles--;
switch (pl) {
case 0:{trisToAdd = Triangle.ClipAgainstPlane(new Vector(0,0,0),new Vector(0,1,0),test,clipped);}break;
case 1:{trisToAdd = Triangle.ClipAgainstPlane(new Vector(0,getHeight()-1f,0),new Vector(0,-1,0),test,clipped);}break;
case 2:{trisToAdd = Triangle.ClipAgainstPlane(new Vector(0,0,0),new Vector(1,0,0),test,clipped);}break;
case 3:{trisToAdd = Triangle.ClipAgainstPlane(new Vector(getWidth()-1f,0,0),new Vector(-1,0,0),test,clipped);}break;
}
for (int w=0;w<trisToAdd;w++) {
triList.add(clipped[w]);
}
}
newTriangles=triList.size();
}
if (SigRenderer.PROFILING) {
startTime2 = System.nanoTime();
}
for (Triangle tt : triList) {
if (tt.tex!=null) {
tt.unmodifiedTri.nextRenderTime=tt.unmodifiedTri.nextRenderTime2=-1;
DrawUtils.TexturedTriangle(p,
(int)tt.A.x,(int)tt.A.y,tt.T.u,tt.T.v,tt.T.w,
(int)tt.B.x,(int)tt.B.y,tt.U.u,tt.U.v,tt.U.w,
(int)tt.C.x,(int)tt.C.y,tt.V.u,tt.V.v,tt.V.w,
tt.tex,(tt.col&0xFF0000)>>16,tt,DrawUtils.TRANSLUCENT_ONLY_RENDERING);
} else {
DrawUtils.FillTriangle(p,(int)tt.A.x,(int)tt.A.y,(int)tt.B.x,(int)tt.B.y,(int)tt.C.x,(int)tt.C.y,tt.getColor());
}
if (SigRenderer.WIREFRAME) {
DrawUtils.DrawTriangle(p,(int)tt.A.x,(int)tt.A.y,(int)tt.B.x,(int)tt.B.y,(int)tt.C.x,(int)tt.C.y,Color.WHITE.getRGB());
}
}
if (SigRenderer.PROFILING) {
totalTime+=System.nanoTime()-startTime2;
}
}
for (int x=0;x<SigRenderer.SCREEN_WIDTH;x++) {
for (int y=0;y<SigRenderer.SCREEN_HEIGHT;y++) {
Triangle t = SigRenderer.depthBuffer_tri[x+y*SigRenderer.SCREEN_WIDTH];
if (t!=null) {
t.nextRenderTime=t.nextRenderTime2=-1;
}
}
}
}
SigRenderer.request=null;
SigRenderer.answer=SigRenderer.tempAnswer;
if (SigRenderer.PROFILING) {
System.out.println((totalTime/1000000f)+"ms/"+(System.currentTimeMillis()-profileStartTime)+"ms");
}
}
private void prepareTriForRender(Matrix matWorld, Matrix matView, Triangle t, Collection<Triangle> accumulatedTris) {
prepareTriForRender(matWorld,matView,t,accumulatedTris,false);
}
private void prepareTriForRender(Matrix matWorld, Matrix matView, Triangle t, Collection<Triangle> accumulatedTris, boolean buffer) {
if (!buffer||(buffer&&t.nextRenderTime<=System.currentTimeMillis())) {
Triangle triProjected = new Triangle(),triPreTransform=new Triangle(),triTransformed=new Triangle(),triViewed=new Triangle(),triRotation = new Triangle();
matWorld = Matrix.MakeTranslation(-0.5f,0,-0.5f);
triPreTransform.A = Matrix.MultiplyVector(matWorld,t.A);
triPreTransform.B = Matrix.MultiplyVector(matWorld,t.B);
triPreTransform.C = Matrix.MultiplyVector(matWorld,t.C);
t.copyExtraDataTo(triPreTransform);
triPreTransform.unmodifiedTri=t;
if (t.b!=null) {
matWorld = Matrix.MakeRotationY((float)(t.b.getFacingDirection().ordinal()*(Math.PI/2)));
}
triTransformed.A = Matrix.MultiplyVector(matWorld,triPreTransform.A);
triTransformed.B = Matrix.MultiplyVector(matWorld,triPreTransform.B);
triTransformed.C = Matrix.MultiplyVector(matWorld,triPreTransform.C);
triPreTransform.copyExtraDataTo(triTransformed);
if (t.b!=null) {
matWorld = Matrix.MakeTranslation(t.b.pos.x,t.b.pos.y,t.b.pos.z);
}
triRotation.A = Matrix.MultiplyVector(matWorld,triTransformed.A);
triRotation.B = Matrix.MultiplyVector(matWorld,triTransformed.B);
triRotation.C = Matrix.MultiplyVector(matWorld,triTransformed.C);
triTransformed.copyExtraDataTo(triRotation);
Vector normal=new Vector(),line1=new Vector(),line2=new Vector();
line1 = Vector.subtract(triRotation.B,triRotation.A);
line2 = Vector.subtract(triRotation.C,triRotation.A);
normal = Vector.crossProduct(line1,line2);
normal = Vector.normalize(normal);
Vector center = Vector.divide(Vector.add(triRotation.A,Vector.add(triRotation.B,triRotation.C)),3);
Vector newCamera = Vector.add(SigRenderer.vCamera,SigRenderer.vCameraOffset);
Vector cameraRay = Vector.subtract(center,newCamera);
float distSquared = ((triRotation.b.pos.x-newCamera.x)*(triRotation.b.pos.x-newCamera.x)+
(triRotation.b.pos.y-newCamera.y)*(triRotation.b.pos.y-newCamera.y)+
(triRotation.b.pos.z-newCamera.z)*(triRotation.b.pos.z-newCamera.z));
if (Vector.dotProduct(normal,cameraRay)<0&&Vector.dotProduct(cameraRay,SigRenderer.vLookDir)>-0.2f&&distSquared<4096) {
Vector lightDir = Vector.multiply(SigRenderer.vLookDir, -1);
lightDir = Vector.normalize(lightDir);
//System.out.println(-Vector.dotProduct(normal,Vector.normalize(cameraRay)));
float dp = 0.1f;
if (t.b!=null) {
dp = Math.max(0.1f,Math.min(1,(1f/((triRotation.b.pos.x-newCamera.x)*(triRotation.b.pos.x-newCamera.x)+
(triRotation.b.pos.y-newCamera.y)*(triRotation.b.pos.y-newCamera.y)+
(triRotation.b.pos.z-newCamera.z)*(triRotation.b.pos.z-newCamera.z))*64)))*0.5f+Math.max(0.1f,Math.min(1,1-Vector.dotProduct(normal,SigRenderer.vLookDir)))*0.5f;
} else {
dp = Math.max(0.1f,Vector.dotProduct(lightDir,normal));
}
/*Vector center = Vector.divide(Vector.add(triTransformed.A,Vector.add(triTransformed.B,triTransformed.C)),3);
Vector cameraRay2 = Vector.subtract(center,newCamera);
float dp = Math.max(0.1f,Math.min(1,(1f/((cameraRay2.x-center.x)*(cameraRay2.x-center.x)+
(cameraRay2.y-center.y)*(cameraRay2.y-center.y)+
(cameraRay2.z-center.z)*(cameraRay2.z-center.z))*4)));*/
/*float dp = Math.max(0.1f,Math.min(1,(1f/((triTransformed.b.pos.x-newCamera.x)*(triTransformed.b.pos.x-newCamera.x)+
(triTransformed.b.pos.y-newCamera.y)*(triTransformed.b.pos.y-newCamera.y)+
(triTransformed.b.pos.z-newCamera.z)*(triTransformed.b.pos.z-newCamera.z))*4)));*/
triViewed.A = Matrix.MultiplyVector(matView,triRotation.A);
triViewed.B = Matrix.MultiplyVector(matView,triRotation.B);
triViewed.C = Matrix.MultiplyVector(matView,triRotation.C);
triRotation.copyExtraDataTo(triViewed);
triViewed.setColor((0)+(0<<8)+((int)(dp*255)<<16));
int clippedTriangles = 0;
Triangle[] clipped = new Triangle[]{new Triangle(),new Triangle()};
clippedTriangles = Triangle.ClipAgainstPlane(new Vector(0,0,0.01f),new Vector(0,0,1), triViewed, clipped);
for (int i=0;i<clippedTriangles;i++) {
if (i>0) {
triProjected = new Triangle();
}
triProjected.A = Matrix.MultiplyVector(SigRenderer.matProj,clipped[i].A);
triProjected.B = Matrix.MultiplyVector(SigRenderer.matProj,clipped[i].B);
triProjected.C = Matrix.MultiplyVector(SigRenderer.matProj,clipped[i].C);
triProjected.col = clipped[i].col;
triProjected.tex = clipped[i].tex;
triProjected.T = (Vector2)clipped[i].T.clone();
triProjected.U = (Vector2)clipped[i].U.clone();
triProjected.V = (Vector2)clipped[i].V.clone();
triProjected.b=clipped[i].b;
triProjected.unmodifiedTri=clipped[i].unmodifiedTri;
triProjected.dir=clipped[i].dir;
triProjected.T.u = triProjected.T.u/triProjected.A.w;
triProjected.U.u = triProjected.U.u/triProjected.B.w;
triProjected.V.u = triProjected.V.u/triProjected.C.w;
triProjected.T.v = triProjected.T.v/triProjected.A.w;
triProjected.U.v = triProjected.U.v/triProjected.B.w;
triProjected.V.v = triProjected.V.v/triProjected.C.w;
triProjected.T.w = 1.0f/triProjected.A.w;
triProjected.U.w = 1.0f/triProjected.B.w;
triProjected.V.w = 1.0f/triProjected.C.w;
triProjected.A = Vector.divide(triProjected.A, triProjected.A.w);
triProjected.B = Vector.divide(triProjected.B, triProjected.B.w);
triProjected.C = Vector.divide(triProjected.C, triProjected.C.w);
triProjected.A.x*=-1f;
triProjected.A.y*=-1f;
triProjected.B.x*=-1f;
triProjected.B.y*=-1f;
triProjected.C.x*=-1f;
triProjected.C.y*=-1f;
Vector viewOffset = new Vector(1,1,0);
triProjected.A = Vector.add(triProjected.A,viewOffset);
triProjected.B = Vector.add(triProjected.B,viewOffset);
triProjected.C = Vector.add(triProjected.C,viewOffset);
triProjected.A.x*=0.5f*SigRenderer.SCREEN_WIDTH;
triProjected.A.y*=0.5f*SigRenderer.SCREEN_HEIGHT;
triProjected.B.x*=0.5f*SigRenderer.SCREEN_WIDTH;
triProjected.B.y*=0.5f*SigRenderer.SCREEN_HEIGHT;
triProjected.C.x*=0.5f*SigRenderer.SCREEN_WIDTH;
triProjected.C.y*=0.5f*SigRenderer.SCREEN_HEIGHT;
accumulatedTris.add(triProjected);
}
} else {
t.nextRenderTime=System.currentTimeMillis()+50;
}
}
}
public void repaint() {
super.repaint();
}
@Override
public void paintComponent(Graphics g) {
startTime = System.nanoTime();
super.paintComponent(g);
// perform draws on pixels
render();
// ask ImageProducer to update image
mImageProducer.newPixels();
// draw it on panel
g.drawImage(this.imageBuffer, 0, 0, this);
endTime=System.nanoTime();
SigRenderer.DRAWLOOPTIME=(endTime-startTime)/1000000f;
}
/**
* Overrides ImageObserver.imageUpdate.
* Always return true, assuming that imageBuffer is ready to go when called
*/
@Override
public boolean imageUpdate(Image image, int a, int b, int c, int d, int e) {
return true;
}
@Override
public void run() {
while (true) {
// request a JPanel re-drawing
repaint();
try {Thread.sleep(5);} catch (InterruptedException e) {}
}
}
}