AdAstraDebugDraw.java

package uk.co.flyingsquirrels.rendering;

import org.jbox2d.common.Color3f;
import org.jbox2d.common.Vec2;
import org.jbox2d.common.XForm;
import org.jbox2d.dynamics.DebugDraw;
import org.newdawn.slick.Color;
import org.newdawn.slick.Font;
import org.newdawn.slick.Graphics;
import org.newdawn.slick.geom.Circle;
import org.newdawn.slick.geom.Polygon;

public class AdAstraDebugDraw extends DebugDraw {

	private final Font font;

	private Graphics g;

	public AdAstraDebugDraw(Font font) {
		this.font = font;
		appendFlags(DebugDraw.e_shapeBit);
//		appendFlags(DebugDraw.e_jointBit);
	}

	public void setGraphics(Graphics g) {
		this.g = g;
		this.g.setAntiAlias(true);
	}

	private void drawCircle(Vec2 center, float radius, Color3f color,
			boolean solid, Vec2 axis) {
		Circle circle = new Circle(center.x, center.y, radius);
		Color slickColor = toSlickColor(color);
		g.setColor(slickColor);
		g.draw(circle);
		if (solid) {
			slickColor.a = 0.5f;
			g.fill(circle);
			if (axis != null) {
				drawSegment(center, new Vec2(center.x + radius
						* axis.x, center.y + radius * axis.y),
						color);
			}
		}
	}

	@Override
	public void drawCircle(Vec2 center, float radius, Color3f color) {
		drawCircle(center, radius, color, false, null);
	}

	@Override
	public void drawSolidCircle(Vec2 center, float radius, Vec2 axis,
			Color3f color) {
		drawCircle(center, radius, color, true, axis);
	}

	@Override
	public void drawPoint(Vec2 position, float f, Color3f color3f) {
		drawCircle(position, f, color3f, true, null);
	}

	private void drawPolygon(Vec2[] vertices, int vertexCount, Color3f color,
			boolean solid) {
		Polygon polygon = new Polygon();
		for (int i = 0; i < vertexCount; ++i) {
			polygon.addPoint(vertices[i].x, vertices[i].y);
		}
		Color slickColor = toSlickColor(color);
		g.setColor(slickColor);
		g.draw(polygon);
		if (solid) {
			slickColor.a = 0.5f;
			g.fill(polygon);
		}
	}

	@Override
	public void drawPolygon(Vec2[] vertices, int vertexCount, Color3f color) {
		drawPolygon(vertices, vertexCount, color, false);
	}

	@Override
	public void drawSolidPolygon(Vec2[] vertices, int vertexCount, Color3f color) {
		drawPolygon(vertices, vertexCount, color, true);
	}

	@Override
	public void drawSegment(Vec2 p1, Vec2 p2, Color3f color) {
		Color slickColor = toSlickColor(color);
		g.setColor(slickColor);
		g.setLineWidth(1);
		g.drawLine(p1.x, p1.y, p2.x, p2.y);
	}

	@Override
	public void drawString(float x, float y, String s, Color3f color) {
		Color slickColor = toSlickColor(color);
		g.setFont(font);
		g.setColor(slickColor);
		g.drawString(s, x, y);
	}

	@Override
	public void drawXForm(XForm xf) {
		// TODO Auto-generated method stub

	}
	
	private Color toSlickColor(Color3f color) {
		Color slickColor = new Color(color.x / 255.0f, color.y / 255.0f,
				color.z / 255.0f);
		return slickColor;
	}

}