sigonasr2/SigRenderer
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Ray tracing mess-arounds.

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Co-authored-by: sigonasr2 <sigonasr2@gmail.com>
This commit is contained in:
sigonasr2, Sig, Sigo 2021-11-01 17:38:03 +00:00
parent 9014eb92e6
commit 29c44d4207
4 changed files with 149 additions and 56 deletions
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34
src/sig/Panel.java
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@ -1,27 +1,43 @@
package sig; package sig;
import javax.swing.JPanel; import javax.swing.JPanel;
import javax.vecmath.Vector3d; import javax.vecmath.Vector3f;
import java.awt.Graphics; import java.awt.Graphics;
import java.awt.Color; import java.awt.Color;
public class Panel extends JPanel{ public class Panel extends JPanel{
long startTime = System.nanoTime();
long endTime = System.nanoTime();
public void repaint() {
super.repaint();
startTime = System.nanoTime();
}
public void paintComponent(Graphics g) { public void paintComponent(Graphics g) {
Vector3d origin = new Vector3d(0,0,10); g.clearRect(0,0,SigRenderer.SCREEN_WIDTH,SigRenderer.SCREEN_HEIGHT);
for (int x=0;x<SigRenderer.SCREEN_WIDTH;x++) { //Vector3f origin = new Vector3f(Math.cos(SigRenderer.rot)*10,0,10+Math.sin(SigRenderer.rot)*10);
for (int y=0;y<SigRenderer.SCREEN_HEIGHT;y++) { /*for (int x=0;x<SigRenderer.SCREEN_WIDTH/RESOLUTION;x++) {
Vector3d dir = new Vector3d((-SigRenderer.SCREEN_WIDTH/2d+x),(-SigRenderer.SCREEN_HEIGHT/2d+y),SigRenderer.SCREEN_WIDTH); for (int y=0;y<SigRenderer.SCREEN_HEIGHT/RESOLUTION;y++) {
Vector3f dir = new Vector3f((-SigRenderer.SCREEN_WIDTH/2d+x*RESOLUTION),(-SigRenderer.SCREEN_HEIGHT/2d+y*RESOLUTION),SigRenderer.SCREEN_WIDTH);
if (SigRenderer.tri.rayTriangleIntersect(origin, dir)) { if (SigRenderer.tri.rayTriangleIntersect(origin, dir)) {
g.setColor(Color.BLACK); g.setColor(Color.BLACK);
g.fillRect(SigRenderer.SCREEN_WIDTH-x,SigRenderer.SCREEN_HEIGHT-y,1,1); g.fillRect((int)(SigRenderer.SCREEN_WIDTH-x*RESOLUTION),(int)(SigRenderer.SCREEN_HEIGHT-y*RESOLUTION),(int)RESOLUTION,(int)RESOLUTION);
//System.out.println("Intersects at "+origin+"/"+dir); //System.out.println("Intersects at "+origin+"/"+dir);
} } else
if (SigRenderer.tri2.rayTriangleIntersect(origin, dir)) { if (SigRenderer.tri2.rayTriangleIntersect(origin, dir)) {
g.setColor(Color.BLUE); g.setColor(Color.BLUE);
g.fillRect(SigRenderer.SCREEN_WIDTH-x,SigRenderer.SCREEN_HEIGHT-y,1,1); g.fillRect((int)(SigRenderer.SCREEN_WIDTH-x*RESOLUTION),(int)(SigRenderer.SCREEN_HEIGHT-y*RESOLUTION),(int)RESOLUTION,(int)RESOLUTION);
//System.out.println("Intersects at "+origin+"/"+dir); //System.out.println("Intersects at "+origin+"/"+dir);
} }
} }
} }*/
for (Pixel p:SigRenderer.pixels) {
if (!g.getColor().equals(p.col)) {
g.setColor(p.col);
}
g.fillRect(p.x,p.y,(int)SigRenderer.RESOLUTION,(int)SigRenderer.RESOLUTION);
}
endTime=System.nanoTime();
SigRenderer.DRAWLOOPTIME = (endTime-startTime)/1000000f;
} }
} }

13
src/sig/Pixel.java Normal file
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@ -0,0 +1,13 @@
package sig;
import java.awt.Color;
public class Pixel {
int x,y;
Color col;
Pixel(int x,int y,Color col) {
this.x=x;
this.y=y;
this.col=col;
}
}

96
src/sig/SigRenderer.java
View File

@ -1,28 +1,62 @@
package sig; package sig;
import javax.swing.JFrame; import javax.swing.JFrame;
import javax.vecmath.Vector3d; import javax.vecmath.Point2d;
import javax.vecmath.Tuple3d;
import javax.vecmath.Vector3f;
import java.awt.event.MouseEvent; import java.awt.event.MouseEvent;
import java.awt.event.MouseListener; import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener; import java.awt.event.MouseMotionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.util.ArrayList;
import java.util.List;
import java.awt.Toolkit;
import java.awt.Color;
public class SigRenderer implements MouseListener,MouseMotionListener{ public class SigRenderer implements KeyListener,MouseListener,MouseMotionListener{
public static Triangle tri; public static Triangle tri,tri2,tri3,tri4,tri5,tri6;
public static Triangle tri2;
public final static int SCREEN_WIDTH=1280; public final static int SCREEN_WIDTH=1280;
public final static int SCREEN_HEIGHT=720; public final static int SCREEN_HEIGHT=720;
public final static long TIMEPERTICK = 16666667l; public final static long TIMEPERTICK = 16666667l;
public static double DRAWTIME=0; public static float DRAWTIME=0;
public static float DRAWLOOPTIME=0;
public static final float RESOLUTION=4;
Vector3d origin = new Vector3d(0,0,-10); Vector3f origin = new Vector3f(0,0,10);
Vector3d dir = new Vector3d(0,0,1); public static float rot = (float)Math.PI/4; //In radians.
public static List<Pixel> pixels;
public void runGameLoop() { public void runGameLoop() {
rot+=Math.PI/480d;
pixels = new ArrayList<>();
for (int x=0;x<SigRenderer.SCREEN_WIDTH/RESOLUTION;x++) {
for (int y=0;y<SigRenderer.SCREEN_HEIGHT/RESOLUTION;y++) {
Vector3f dir = new Vector3f((-SigRenderer.SCREEN_WIDTH/2f+x*RESOLUTION),(-SigRenderer.SCREEN_HEIGHT/2f+y*RESOLUTION),SigRenderer.SCREEN_WIDTH).dot;
if (SigRenderer.tri.rayTriangleIntersect(origin, dir)) {
pixels.add(new Pixel((int)(SigRenderer.SCREEN_WIDTH-x*RESOLUTION),(int)(SigRenderer.SCREEN_HEIGHT-y*RESOLUTION),Color.BLACK));
}
if (SigRenderer.tri2.rayTriangleIntersect(origin, dir)) {
pixels.add(new Pixel((int)(SigRenderer.SCREEN_WIDTH-x*RESOLUTION),(int)(SigRenderer.SCREEN_HEIGHT-y*RESOLUTION),Color.BLUE));
}
if (SigRenderer.tri3.rayTriangleIntersect(origin, dir)) {
pixels.add(new Pixel((int)(SigRenderer.SCREEN_WIDTH-x*RESOLUTION),(int)(SigRenderer.SCREEN_HEIGHT-y*RESOLUTION),Color.RED));
}
if (SigRenderer.tri4.rayTriangleIntersect(origin, dir)) {
pixels.add(new Pixel((int)(SigRenderer.SCREEN_WIDTH-x*RESOLUTION),(int)(SigRenderer.SCREEN_HEIGHT-y*RESOLUTION),Color.GREEN));
}
}
}
} }
SigRenderer(JFrame f) { SigRenderer(JFrame f) {
tri = new Triangle(new Vector3d(-1,-1,0),new Vector3d(1,-1,0),new Vector3d(0,2,0));
tri2 = new Triangle(new Vector3d(-1,-1,120),new Vector3d(1,-1,120),new Vector3d(0,2,120)); tri = new Triangle(new Vector3f(-1,-1,0),new Vector3f(0,-1,0),new Vector3f(-1,0,0));
tri2 = new Triangle(new Vector3f(-1,0,0),new Vector3f(0,-1,0),new Vector3f(0,0,0));
tri3 = new Triangle(new Vector3f(0,0,0),new Vector3f(0,-1,0),new Vector3f(0,-1,-1));
tri4 = new Triangle(new Vector3f(0,-1,-1),new Vector3f(0,0,-1),new Vector3f(0,-1,0));
/*tri5 = new Triangle(new Vector3f(0,-1,0),new Vector3f(0,-1,-1),new Vector3f(0,0,0));
tri6 = new Triangle(new Vector3f(0,0,0),new Vector3f(0,-1,-1),new Vector3f(0,0,-1));*/
Panel p = new Panel(); Panel p = new Panel();
@ -32,29 +66,29 @@ public class SigRenderer implements MouseListener,MouseMotionListener{
long startTime = System.nanoTime(); long startTime = System.nanoTime();
runGameLoop(); runGameLoop();
p.repaint(); p.repaint();
Toolkit.getDefaultToolkit().sync();
long endTime = System.nanoTime(); long endTime = System.nanoTime();
long diff = endTime-startTime; long diff = endTime-startTime;
if (diff>TIMEPERTICK) { //Took longer than 1/60th of a second. No sleep.
System.err.println("Frame Drawing took longer than "+TIMEPERTICK+"ns to calculate ("+diff+"ns total)!");
} else {
try { try {
long sleepTime = TIMEPERTICK - diff; long sleepTime = TIMEPERTICK - diff;
long millis = (sleepTime)/1000000; long millis = (sleepTime)/1000000;
int nanos = (int)(sleepTime-(((sleepTime)/1000000)*1000000)); int nanos = (int)(sleepTime-(((sleepTime)/1000000)*1000000));
//System.out.println("FRAME DRAWING: Sleeping for ("+millis+"ms,"+nanos+"ns) - "+(diff)+"ns"); //System.out.println("FRAME DRAWING: Sleeping for ("+millis+"ms,"+nanos+"ns) - "+(diff)+"ns");
DRAWTIME = (double)diff/1000000; DRAWTIME = (float)diff/1000000;
f.setTitle("Game Loop: "+DRAWTIME+"ms"); f.setTitle("Game Loop: "+DRAWTIME+"ms, Draw Loop: "+DRAWLOOPTIME+"ms");
if (sleepTime>0) {
Thread.sleep(millis,nanos); Thread.sleep(millis,nanos);
}
} catch (InterruptedException e) { } catch (InterruptedException e) {
e.printStackTrace(); e.printStackTrace();
} }
} }
} }
}
}.start(); }.start();
f.getContentPane().addMouseListener(this); f.getContentPane().addMouseListener(this);
f.getContentPane().addMouseMotionListener(this); f.getContentPane().addMouseMotionListener(this);
f.addKeyListener(this);
f.add(p); f.add(p);
f.setSize(SCREEN_WIDTH,SCREEN_HEIGHT); f.setSize(SCREEN_WIDTH,SCREEN_HEIGHT);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
@ -92,4 +126,34 @@ public class SigRenderer implements MouseListener,MouseMotionListener{
@Override @Override
public void mouseMoved(MouseEvent e) { public void mouseMoved(MouseEvent e) {
} }
@Override
public void keyTyped(KeyEvent e) {
// TODO Auto-generated method stub
}
@Override
public void keyPressed(KeyEvent e) {
switch (e.getKeyCode()) {
case KeyEvent.VK_UP:{
origin.add(new Vector3f(0,0,-1));
}break;
case KeyEvent.VK_RIGHT:{
origin.add(new Vector3f(1,0,0));
}break;
case KeyEvent.VK_LEFT:{
origin.add(new Vector3f(-1,0,0));
}break;
case KeyEvent.VK_DOWN:{
origin.add(new Vector3f(0,0,1));
}break;
}
}
@Override
public void keyReleased(KeyEvent e) {
// TODO Auto-generated method stub
}
} }

50
src/sig/Triangle.java
View File

@ -1,9 +1,9 @@
package sig; package sig;
import javax.vecmath.Vector3d; import javax.vecmath.Vector3f;
public class Triangle { public class Triangle {
Vector3d A,B,C; Vector3f A,B,C;
Triangle(Vector3d A,Vector3d B,Vector3d C) { Triangle(Vector3f A,Vector3f B,Vector3f C) {
this.A=A; this.A=A;
this.B=B; this.B=B;
this.C=C; this.C=C;
@ -13,56 +13,56 @@ public class Triangle {
return "Triangle [A=" + A + ", B=" + B + ", C=" + C + "]"; return "Triangle [A=" + A + ", B=" + B + ", C=" + C + "]";
} }
public Vector3d getNormal() { public Vector3f getNormal() {
Vector3d AB = (Vector3d)A.clone(); Vector3f AB = (Vector3f)A.clone();
AB.sub(B); AB.sub(B);
Vector3d BC = (Vector3d)B.clone(); Vector3f BC = (Vector3f)B.clone();
BC.sub(C); BC.sub(C);
Vector3d crossP = new Vector3d(); Vector3f crossP = new Vector3f();
crossP.cross(AB,BC); crossP.cross(AB,BC);
//crossP.normalize(); //crossP.normalize();
return crossP; return crossP;
} }
public double distanceFromOrigin() { public float distanceFromOrigin() {
return getNormal().dot(A); return getNormal().dot(A);
} }
public boolean rayTriangleIntersect(Vector3d origin,Vector3d dir) { public boolean rayTriangleIntersect(Vector3f origin,Vector3f dir) {
Vector3d N = getNormal(); Vector3f N = getNormal();
double NrayDir = N.dot(dir); float NrayDir = N.dot(dir);
if (NrayDir<=0.001) { //Very small, so it's parallel. if (NrayDir<=0.001) { //Very small, so it's parallel.
return false; return false;
} }
double d = distanceFromOrigin(); float d = distanceFromOrigin();
double T=(getNormal().dot(origin)+d)/(NrayDir); float T=(getNormal().dot(origin)+d)/(NrayDir);
if (T<0) {return false;} //Triangle is behind the ray. if (T<0) {return false;} //Triangle is behind the ray.
//System.out.println("Not behind."); //System.out.println("Not behind.");
Vector3d scaleMult = (Vector3d)dir.clone(); Vector3f scaleMult = (Vector3f)dir.clone();
scaleMult.scale(T); scaleMult.scale(T);
Vector3d P = (Vector3d)origin.clone(); Vector3f P = (Vector3f)origin.clone();
P.add(scaleMult); P.add(scaleMult);
Vector3d C; Vector3f C;
Vector3d edge0 = (Vector3d)B.clone(); edge0.sub(A); Vector3f edge0 = (Vector3f)B.clone(); edge0.sub(A);
Vector3d vp0 = (Vector3d)P.clone(); vp0.sub(A); Vector3f vp0 = (Vector3f)P.clone(); vp0.sub(A);
C = new Vector3d(); C.cross(edge0,vp0); C = new Vector3f(); C.cross(edge0,vp0);
if (N.dot(C)<0) {return false;} if (N.dot(C)<0) {return false;}
Vector3d edge1 = (Vector3d)this.C.clone(); edge1.sub(B); Vector3f edge1 = (Vector3f)this.C.clone(); edge1.sub(B);
Vector3d vp1 = (Vector3d)P.clone(); vp1.sub(B); Vector3f vp1 = (Vector3f)P.clone(); vp1.sub(B);
C = new Vector3d(); C.cross(edge1,vp1); C = new Vector3f(); C.cross(edge1,vp1);
if (N.dot(C)<0) {return false;} if (N.dot(C)<0) {return false;}
Vector3d edge2 = (Vector3d)A.clone(); edge2.sub(this.C); Vector3f edge2 = (Vector3f)A.clone(); edge2.sub(this.C);
Vector3d vp2 = (Vector3d)P.clone(); vp2.sub(this.C); Vector3f vp2 = (Vector3f)P.clone(); vp2.sub(this.C);
C = new Vector3d(); C.cross(edge2,vp2); C = new Vector3f(); C.cross(edge2,vp2);
if (N.dot(C)<0) {return false;} if (N.dot(C)<0) {return false;}
return true; return true;