@Override
public synchronized void line(V2 start, V2 end) {
// move based on camera position where applicable
V2 pov_start = (use_camera) ? camera.getPerspective(start) : start;
V2 pov_end = (use_camera) ? camera.getPerspective(end) : end;
draw_queue.add(
new DrawShape(new Line2D.Float(pov_start.x, pov_start.y, pov_end.x, pov_end.y), false));
// lines are not filled
}
@Override
public void triangle(V2 a, V2 b, V2 c, boolean fill) {
V2 pa = (use_camera) ? camera.getPerspective(a) : a,
pb = (use_camera) ? camera.getPerspective(b) : b,
pc = (use_camera) ? camera.getPerspective(c) : c;
int xpts[] = {(int) pa.x, (int) pb.x, (int) pc.x},
ypts[] = {(int) pa.y, (int) pb.y, (int) pc.y};
draw_queue.add(new DrawShape(new Polygon(xpts, ypts, 3), fill));
}
@Override
public synchronized void circle(V2 centre, float radius, boolean fill) {
// move based on camera position where applicable
V2 pov_centre;
if (use_camera) {
radius *= camera.getZoom();
pov_centre = camera.getPerspective(centre);
} else pov_centre = centre;
draw_queue.add(
new DrawShape(
new Ellipse2D.Float(
pov_centre.x - radius, pov_centre.y - radius, radius * 2, radius * 2),
fill));
}
// modify the canvas itself
@Override
public synchronized ICanvas setSize(V2 size) {
// reset size
this.size = size;
// reset camera
if (use_camera) camera.setProjectionSize(size);
return this;
}
@Override
public synchronized void box(Rect rect, boolean fill) {
// move based on camera position where applicable
Rect pov_rect = (use_camera) ? camera.getPerspective(rect).ceil() : rect;
draw_queue.add(
new DrawShape(
new Rectangle2D.Float(
pov_rect.x, pov_rect.y,
pov_rect.w, pov_rect.h),
fill));
}
@Override
public synchronized ICanvas setCamera(ICamera camera) {
// attach camera and reset its field size
this.camera = camera;
camera.setProjectionSize(size);
// maintain invariant: (camera == null) => use_camera = false
if (!use_camera && camera != null) use_camera = true;
else if (camera == null) use_camera = false;
return this;
}
@Override
public void angleBox(V2 o, V2 d, float size, boolean fill) {
// move based on camera position where applicable
V2 po = (use_camera) ? camera.getPerspective(o) : o;
// scale direction-vector based on zoom
V2 pd = (use_camera) ? d.clone().scale(camera.getZoom() * size) : d.clone().scale(size);
int
xpts
[] =
{
(int) (po.x + pd.x + pd.y), (int) (po.x + pd.x - pd.y),
(int) (po.x + -pd.x - pd.y), (int) (po.x + -pd.x + pd.y)
},
ypts
[] =
{
(int) (po.y + -pd.x + pd.y), (int) (po.y + pd.x + pd.y),
(int) (po.y + pd.x - pd.y), (int) (po.y + -pd.x - pd.y)
};
draw_queue.add(new DrawShape(new Polygon(xpts, ypts, 4), fill));
}
@Override
public synchronized void text(String string, V2 position) {
// move based on camera position where applicable
V2 pov_pos = (use_camera) ? camera.getPerspective(position) : position;
draw_queue.add(new DrawText(string, pov_pos));
}
// methods
public DrawImage(Rect source, Rect dest, BufferedImage image, ICamera c) {
this.source = source;
this.dest = (c != null) ? c.getPerspective(dest).ceil() : dest;
this.image = image;
}