69 lines
2.0 KiB
Java
69 lines
2.0 KiB
Java
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package sig.utils;
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import java.awt.Color;
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import sig.SigRenderer;
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public class DrawUtils {
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public static void DrawTriangle(int[]canvas,int x1,int y1,int x2,int y2,int x3,int y3,Color col) {
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DrawLine(canvas,x1,y1,x2,y2,col);
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DrawLine(canvas,x2,y2,x3,y3,col);
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DrawLine(canvas,x3,y3,x1,y1,col);
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}
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public static void DrawLine(int[] canvas,int x1,int y1,int x2,int y2,Color col) {
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int x,y,dx,dy,dx1,dy1,px,py,xe,ye,i;
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dx=x2-x1;dy=y2-y1;
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dx1=Math.abs(dx);dy1=Math.abs(dy);
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px=2*dy1-dx1;py=2*dx1-dy1;
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if (dy1<=dx1) {
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if (dx>=0) {
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x=x1;y=y1;xe=x2;
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} else {
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x=x2;y=y2;xe=x1;
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}
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Draw(canvas,x,y,col);
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for (i=0;x<xe;i++) {
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x=x+1;
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if (px<0) {
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px=px+2*dy1;
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} else {
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if ((dx<0&&dy<0)||(dx>0&&dy>0)) {
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y=y+1;
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} else {
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y=y-1;
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}
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px=px+2*(dy1-dx1);
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}
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Draw(canvas,x,y,col);
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}
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} else {
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if (dy>=0) {
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x=x1;y=y1;ye=y2;
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} else {
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x=x2;y=y2;ye=y1;
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}
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Draw(canvas,x,y,col);
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for (i=0;y<ye;i++) {
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y=y+1;
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if (py<=0) {
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py=py+2*dx1;
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} else {
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if ((dx<0&&dy<0)||(dx>0&&dy>0)) {
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x=x+1;
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} else {
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x=x-1;
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}
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py=py+2*(dx1-dy1);
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}
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Draw(canvas,x,y,col);
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}
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}
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}
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public static void Draw(int[] canvas,int x,int y,Color col) {
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if (x>=0&&y>=0&&x<SigRenderer.SCREEN_WIDTH&&y<SigRenderer.SCREEN_HEIGHT) {
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//System.out.println(x+","+y);
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canvas[x+y*SigRenderer.SCREEN_WIDTH]=col.getRGB();
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}
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}
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}
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