[SOLVED] Draw Oval in OpenGL

OpenGL Development
#1

hi… can you guys help me with this…

i want to implement a draw oval function for opengl… i am using lwjgl btw… here is my code so far…


	public void drawOval(int x, int y, int width, int height) {
		float theta;
		float angle_increment;
		float x1;
		float y1;
		
		angle_increment = (float) Math.PI / 500;
		GL11.glPushMatrix();
		
		GL11.glTranslatef(x+(width/2), y+(height/2), 0);

		GL11.glColor4f(
				this.color.getRedComponent()/255,
				this.color.getGreenComponent()/255,
				this.color.getBlueComponent()/255,
				this.color.getAlpha()/255
				);
			
		GL11.glBegin(GL11.GL_LINE_LOOP);
		for(theta = 0.0f; theta < Math.PI; theta += angle_increment) {
			x1 = (float) (width/2 * Math.cos(theta));
			y1 = (float) (height/2 * Math.sin(theta));

			GL11.glVertex2f(x1, y1);
		}
		GL11.glEnd();
		
		GL11.glPopMatrix();
	}

this function draws only the lower half of the circle… idk how to fix it, any help is appreciated… thanks in advance :slight_smile:

#2 
 for(theta = 0.0f; theta < Math.PI; theta += angle_increment) {

circle is 2 PI :persecutioncomplex:

#3

ok i found out what’s wrong… i should have used 2Math.PI instead of just one since the circle has a range of 2PI radians… ;D

#4

yeah… i am quite an idiot for not noticing that… ;D thanks anyway… ;D