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SigRenderer2
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Render simple shading via normals and provide a wireframe mode if necessary.

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Co-authored-by: sigonasr2 <sigonasr2@gmail.com>
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sigonasr2, Sig, Sigo 3 years ago
parent a4e7731412
commit cd6dd3217a
4 changed files with 167 additions and 2 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
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  1. 15
      src/sig/Panel.java
  2. 6
      src/sig/SigRenderer.java
  3. 8
      src/sig/Triangle.java
  4. 140
      src/sig/utils/DrawUtils.java

15
src/sig/Panel.java
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@ -77,7 +77,7 @@ public class Panel extends JPanel implements Runnable {
for (int y=0;y<height;y++) {
boolean found=false;
if (!found) {
p[ (int)(x*SigRenderer.RESOLUTION) + (int)(y*SigRenderer.RESOLUTION) * width] = Color.WHITE.getRGB();
p[ (int)(x*SigRenderer.RESOLUTION) + (int)(y*SigRenderer.RESOLUTION) * width] = 0;
}
}
}
@ -130,9 +130,17 @@ public class Panel extends JPanel implements Runnable {
if (normal.x*(triTranslated.A.x-SigRenderer.vCamera.x)+
normal.y*(triTranslated.A.y-SigRenderer.vCamera.y)+
normal.z*(triTranslated.A.z-SigRenderer.vCamera.z)<0) {
Vector3f lightDir = new Vector3f(0,0,-1);
l = (float)Math.sqrt(lightDir.x*lightDir.x+lightDir.y*lightDir.y+lightDir.z*lightDir.z);
lightDir.x/=l; lightDir.y/=l; lightDir.z/=l;
float dp = normal.x*lightDir.x+normal.y*lightDir.y+normal.z*lightDir.z;
Matrix.MultiplyMatrixVector(triTranslated.A, triProjected.A, SigRenderer.matProj);
Matrix.MultiplyMatrixVector(triTranslated.B, triProjected.B, SigRenderer.matProj);
Matrix.MultiplyMatrixVector(triTranslated.C, triProjected.C, SigRenderer.matProj);
triProjected.setColor(new Color(dp,dp,dp));
triProjected.A.x+=1f;
triProjected.A.y+=1f;
@ -147,7 +155,10 @@ public class Panel extends JPanel implements Runnable {
triProjected.C.x*=0.5f*SigRenderer.SCREEN_WIDTH;
triProjected.C.y*=0.5f*SigRenderer.SCREEN_HEIGHT;
DrawUtils.DrawTriangle(p,(int)triProjected.A.x,(int)triProjected.A.y,(int)triProjected.B.x,(int)triProjected.B.y,(int)triProjected.C.x,(int)triProjected.C.y,Color.BLACK);
DrawUtils.FillTriangle(p,(int)triProjected.A.x,(int)triProjected.A.y,(int)triProjected.B.x,(int)triProjected.B.y,(int)triProjected.C.x,(int)triProjected.C.y,triProjected.getColor());
if (SigRenderer.WIREFRAME) {
DrawUtils.DrawTriangle(p,(int)triProjected.A.x,(int)triProjected.A.y,(int)triProjected.B.x,(int)triProjected.B.y,(int)triProjected.C.x,(int)triProjected.C.y,Color.BLACK);
}
}
}
i += 1;

6
src/sig/SigRenderer.java
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@ -4,6 +4,9 @@ import javax.vecmath.Matrix4f;
import javax.vecmath.Point2d;
import javax.vecmath.Tuple3d;
import javax.vecmath.Vector3f;
import sig.utils.DrawUtils;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;
@ -18,6 +21,9 @@ import java.awt.Dimension;
import java.awt.BorderLayout;
public class SigRenderer implements KeyListener,MouseListener,MouseMotionListener{
public static boolean WIREFRAME = false;
public static Mesh cube;
public static int SCREEN_WIDTH=1280;
public static int SCREEN_HEIGHT=720;

8
src/sig/Triangle.java
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@ -1,8 +1,10 @@
package sig;
import javax.vecmath.Vector3f;
import java.awt.Color;
public class Triangle {
Vector3f A,B,C;
Color col = Color.WHITE;
Triangle(Vector3f A,Vector3f B,Vector3f C) {
this.A=A;
this.B=B;
@ -16,4 +18,10 @@ public class Triangle {
public String toString() {
return "Triangle [A=" + A + ", B=" + B + ", C=" + C + "]";
}
public Color getColor() {
return col;
}
public void setColor(Color col) {
this.col=col;
}
}

140
src/sig/utils/DrawUtils.java
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@ -1,10 +1,150 @@
package sig.utils;
import java.awt.Color;
import java.util.Arrays;
import sig.SigRenderer;
public class DrawUtils {
static void drawLine(int[] canvas,int sx,int ex,int ny,Color col) {
for (int i=sx;i<=ex;i++) {
Draw(canvas,i,ny,col);
}
}
public static void FillTriangle(int[] canvas,int x1, int y1, int x2, int y2, int x3, int y3, Color col)
{
int t1x=0, t2x=0, y=0, minx=0, maxx=0, t1xp=0, t2xp=0;
boolean changed1 = false;
boolean changed2 = false;
int signx1=0, signx2=0, dx1=0, dy1=0, dx2=0, dy2=0;
int e1=0, e2=0;
// Sort vertices
if (y1>y2) {int t=y1;y1=y2;y2=t;t=x1;x1=x2;x2=t;}
if (y1>y3) {int t=y1;y1=y3;y3=t;t=x1;x1=x3;x3=t;}
if (y2>y3) {int t=y2;y2=y3;y3=t;t=x2;x2=x3;x3=t;}
t1x = t2x = x1; y = y1; // Starting points
dx1 = (int)(x2 - x1); if (dx1<0) { dx1 = -dx1; signx1 = -1; }
else signx1 = 1;
dy1 = (int)(y2 - y1);
dx2 = (int)(x3 - x1); if (dx2<0) { dx2 = -dx2; signx2 = -1; }
else signx2 = 1;
dy2 = (int)(y3 - y1);
if (dy1 > dx1) { // swap values
int t=dx1;dx1=dy1;dy1=t;
changed1 = true;
}
if (dy2 > dx2) { // swap values
int t=dy2;dy2=dx2;dx2=t;
changed2 = true;
}
e2 = (int)(dx2 >> 1);
// Flat top, just process the second half
boolean goNext=false;
if (y1 == y2) goNext=true;
if (!goNext) {
e1 = (int)(dx1 >> 1);
for (int i = 0; i < dx1;) {
t1xp = 0; t2xp = 0;
if (t1x<t2x) { minx = t1x; maxx = t2x; }
else { minx = t2x; maxx = t1x; }
// process first line until y value is about to change
loop3:
while (i<dx1) {
i++;
e1 += dy1;
while (e1 >= dx1) {
e1 -= dx1;
if (changed1) t1xp = signx1;//t1x += signx1;
else break loop3;
}
if (changed1) break;
else t1x += signx1;
}
// Move line
// process second line until y value is about to change
loop2:
while (true) {
e2 += dy2;
while (e2 >= dx2) {
e2 -= dx2;
if (changed2) t2xp = signx2;//t2x += signx2;
else break loop2;
}
if (changed2) break;
else t2x += signx2;
}
if (minx>t1x) minx = t1x; if (minx>t2x) minx = t2x;
if (maxx<t1x) maxx = t1x; if (maxx<t2x) maxx = t2x;
drawLine(canvas,minx, maxx, y,col); // Draw line from min to max points found on the y
// Now increase y
if (!changed1) t1x += signx1;
t1x += t1xp;
if (!changed2) t2x += signx2;
t2x += t2xp;
y += 1;
if (y == y2) break;
}
}
// Second half
dx1 = (int)(x3 - x2); if (dx1<0) { dx1 = -dx1; signx1 = -1; }
else signx1 = 1;
dy1 = (int)(y3 - y2);
t1x = x2;
if (dy1 > dx1) { // swap values
int t=dy1;dy1=dx1;dx1=t;
changed1 = true;
}
else changed1 = false;
e1 = (int)(dx1 >> 1);
for (int i = 0; i <= dx1; i++) {
t1xp = 0; t2xp = 0;
if (t1x<t2x) { minx = t1x; maxx = t2x; }
else { minx = t2x; maxx = t1x; }
// process first line until y value is about to change
loop3:
while (i<dx1) {
e1 += dy1;
while (e1 >= dx1) {
e1 -= dx1;
if (changed1) { t1xp = signx1; break; }//t1x += signx1;
else break loop3;
}
if (changed1) break;
else t1x += signx1;
if (i<dx1) i++;
}
// process second line until y value is about to change
loop2:
while (t2x != x3) {
e2 += dy2;
while (e2 >= dx2) {
e2 -= dx2;
if (changed2) t2xp = signx2;
else break loop2;
}
if (changed2) break;
else t2x += signx2;
}
if (minx>t1x) minx = t1x; if (minx>t2x) minx = t2x;
if (maxx<t1x) maxx = t1x; if (maxx<t2x) maxx = t2x;
drawLine(canvas,minx, maxx, y,col);
if (!changed1) t1x += signx1;
t1x += t1xp;
if (!changed2) t2x += signx2;
t2x += t2xp;
y += 1;
if (y>y3) return;
}
}
public static void DrawTriangle(int[]canvas,int x1,int y1,int x2,int y2,int x3,int y3,Color col) {
DrawLine(canvas,x1,y1,x2,y2,col);
DrawLine(canvas,x2,y2,x3,y3,col);

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