Fill triangle implementation

Co-authored-by: sigonasr2 <sigonasr2@gmail.com>

src/sig/JavaProjectTemplate.java

@@ -66,7 +66,7 @@ public class JavaProjectTemplate {
 		game.Draw_Text(10,40,new sig.engine.String("Hello World!"),Font.PROFONT_12);
 		game.Draw_Text_Ext(10,52,new sig.engine.String("Hello World 2!"),Font.PROFONT_36,Color.MAGENTA);
 
-		game.Draw_
+		game.Fill_Triangle(160,160,190,190,50,250,Color.RED);
 	}
 
 	public static void main(String[] args) {

src/sig/engine/Panel.java

@@ -237,7 +237,7 @@ public class Panel extends JPanel implements Runnable,KeyListener {
 		gameInstance.drawGame();
     }
     
-    public void FillCircle(Color col,double center_x,double center_y,double r) {
+    public void FillCircle(double center_x,double center_y,double r,Color col) {
     	int counter=0;
     	Point[] points = new Point[CIRCLE_PRECISION];
     	for (double theta=0;theta<Math.PI*2;theta+=((Math.PI*2)/CIRCLE_PRECISION)) {
@@ -245,11 +245,11 @@ public class Panel extends JPanel implements Runnable,KeyListener {
     		//System.out.println("X:"+(Math.sin(theta)*r+center_x)+" Y:"+(Math.cos(theta)*r+center_y));
     		points[counter++]=new Point((int)(Math.round(Math.sin(theta)*r+center_x)),(int)(Math.round(Math.cos(theta)*r+center_y)));
     	}
-        FillPolygon(col,0,0,points);
+        FillPolygon(0,0,col,points);
     }
 
     
-    public void FillOval(Color col,double center_x,double center_y,double w,double h) {
+    public void FillOval(double center_x,double center_y,double w,double h,Color col) {
     	int counter=0;
     	Point[] points = new Point[CIRCLE_PRECISION];
     	double r = Math.max(w,h);
@@ -267,10 +267,10 @@ public class Panel extends JPanel implements Runnable,KeyListener {
     		newP.y+=center_y;
     		points[counter++]=newP;
     	}
-        FillPolygon(col,0,0,points);
+        FillPolygon(0,0,col,points);
     }
     
-    public void FillPolygon(Color col,double x_offset,double y_offset,Point...points) {
+    public void FillPolygon(double x_offset,double y_offset,Color col,Point...points) {
     	Edge[] edges = new Edge[points.length];
     	List<Edge> edges_sorted = new ArrayList<Edge>();
     	for (int i=0;i<points.length;i++) {
@@ -516,7 +516,7 @@ public class Panel extends JPanel implements Runnable,KeyListener {
         }
     }
     
-    public void Fill_Rect(Color col,double x,double y,double w,double h) {
+    public void Fill_Rect(double x,double y,double w,double h,Color col) {
     	for (int xx=0;xx<w;xx++) {
         	for (int yy=0;yy<h;yy++) {
 				if (x+xx>=0&&y+yy>=0&&x+xx<JavaProjectTemplate.WINDOW_WIDTH&&y+yy<JavaProjectTemplate.WINDOW_HEIGHT) {
@@ -584,6 +584,162 @@ public class Panel extends JPanel implements Runnable,KeyListener {
 		}
 	}
 
+	public void Draw_Rect(double x,double y, double w, double h, Color col) {
+		Draw_Line((int)x, (int)y, (int)x+(int)w, (int)y, col);
+		Draw_Line((int)x+(int)w, (int)y, (int)x+(int)w, (int)y+(int)h, col);
+		Draw_Line((int)x+(int)w, (int)y+(int)h, (int)x, (int)y+(int)h, col);
+		Draw_Line((int)x, (int)y+(int)h, (int)x, (int)y, col);
+	}
+
+	public void Draw_Triangle(double x1, double y1, double x2, double y2, double x3, double y3, Color col) {
+		Draw_Line((int)x1, (int)y1, (int)x2, (int)y2, col);
+		Draw_Line((int)x2, (int)y2, (int)x3, (int)y3, col);
+		Draw_Line((int)x3, (int)y3, (int)x1, (int)y1, col);
+	}
+
+	private void drawline(int sx,int ex,int ny,Color col){
+		for (int i = sx; i <= ex; i++) Draw(i, ny, col);
+	}
+
+	public void Fill_Triangle(double x1, double y1, double x2, double y2, double x3, double y3, Color col){
+		int t1x, t2x, y, minx, maxx, t1xp, t2xp;
+		boolean changed1 = false;
+		boolean changed2 = false;
+		int signx1, signx2, dx1, dy1, dx2, dy2;
+		int e1, e2;
+		// Sort vertices
+		int temp;
+		if (y1 > y2) {temp=(int)y1;y1=y2;y2=temp;temp=(int)x1;x1=x2;x2=temp;}
+		if (y1 > y3) {temp=(int)y1;y1=y3;y3=temp;temp=(int)x1;x1=x3;x3=temp;}
+		if (y2 > y3) {temp=(int)y2;y2=y3;y3=temp;temp=(int)x2;x2=x3;x3=temp;}
+
+		t1x = t2x = (int)x1; y = (int)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) {temp=dx1;dx1=dy1;dy1=temp;changed1 = true; }
+		if (dy2 > dx2) {temp=dx2;dx2=dy2;dy2=temp;changed2 = true; }
+
+		e2 = (int)(dx2 >> 1);
+		// Flat top, just process the second half
+		boolean firstHalfDone=false;
+		if (y1 == y2) firstHalfDone=true;
+		if (!firstHalfDone) {
+			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
+				next0:
+				while (i < dx1) {
+					i++;
+					e1 += dy1;
+					while (e1 >= dx1) {
+						e1 -= dx1;
+						if (changed1) t1xp = signx1;//t1x += signx1;
+						else {
+							break next0;
+						}
+					}
+					if (changed1) break;
+					else t1x += signx1;
+				}
+				// Move line
+			next1:
+				// process second line until y value is about to change
+				while (true) {
+					e2 += dy2;
+					while (e2 >= dx2) {
+						e2 -= dx2;
+						if (changed2) t2xp = signx2;//t2x += signx2;
+						else {
+							break next1;
+						}
+					}
+					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(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 = (int)x2;
+
+		if (dy1 > dx1) {   // swap values
+			temp=dy1;dx1=dy1;dy1=temp;
+			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
+			next3:
+			while (i < dx1) {
+				e1 += dy1;
+				while (e1 >= dx1) {
+					e1 -= dx1;
+					if (changed1) { t1xp = signx1; break; }//t1x += signx1;
+					else break next3;
+				}
+				if (changed1) break;
+				else   	   	  t1x += signx1;
+				if (i < dx1) i++;
+			}
+		next4:
+			// process second line until y value is about to change
+			while (t2x != x3) {
+				e2 += dy2;
+				while (e2 >= dx2) {
+					e2 -= dx2;
+					if (changed2) t2xp = signx2;
+					else break next4;
+				}
+				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(minx, maxx, y,col);
+			if (!changed1) t1x += signx1;
+			t1x += t1xp;
+			if (!changed2) t2x += signx2;
+			t2x += t2xp;
+			y += 1;
+			if (y > y3) return;
+		}
+	}
+
 	public void Clear(Color col){
 		for (int y=0;y<JavaProjectTemplate.WINDOW_HEIGHT;y++) {
 			for (int x=0;x<JavaProjectTemplate.WINDOW_WIDTH;x++) {