protected void drawCurrentPolygon(Graphics2D g) {
if (!(sourcePolygon instanceof TexturedPolygon3D)) {
// not a textured polygon - return
return;
}
buildSurface();
TexturedPolygon3D poly = (TexturedPolygon3D) destPolygon;
Texture texture = poly.getTexture();
ScanRenderer scanRenderer = (ScanRenderer) scanRenderers.get(texture.getClass());
scanRenderer.setTexture(texture);
Rectangle3D textureBounds = poly.getTextureBounds();
a.setToCrossProduct(textureBounds.getDirectionV(), textureBounds.getOrigin());
b.setToCrossProduct(textureBounds.getOrigin(), textureBounds.getDirectionU());
c.setToCrossProduct(textureBounds.getDirectionU(), textureBounds.getDirectionV());
// w is used to compute depth at each pixel
w =
SCALE
* MIN_DISTANCE
* Short.MAX_VALUE
/ (viewWindow.getDistance() * c.getDotProduct(textureBounds.getOrigin()));
int y = scanConverter.getTopBoundary();
viewPos.y = viewWindow.convertFromScreenYToViewY(y);
viewPos.z = -viewWindow.getDistance();
while (y <= scanConverter.getBottomBoundary()) {
ScanConverter.Scan scan = scanConverter.getScan(y);
if (scan.isValid()) {
viewPos.x = viewWindow.convertFromScreenXToViewX(scan.left);
int offset =
(y - viewWindow.getTopOffset()) * viewWindow.getWidth()
+ (scan.left - viewWindow.getLeftOffset());
scanRenderer.render(offset, scan.left, scan.right);
}
y++;
viewPos.y--;
}
}
public void parseLine(String line) throws NoSuchElementException {
StringTokenizer tokenizer = new StringTokenizer(line);
String command = tokenizer.nextToken();
if (command.equals("newmtl")) {
// create a new material if needed
String name = tokenizer.nextToken();
currentMaterial = (Material) materials.get(name);
if (currentMaterial == null) {
currentMaterial = new Material();
materials.put(name, currentMaterial);
}
} else if (command.equals("map_Kd")) {
// give the current material a texture
String name = tokenizer.nextToken();
File file = new File(path, name);
if (!file.equals(currentMaterial.sourceFile)) {
currentMaterial.sourceFile = file;
currentMaterial.texture = (ShadedTexture) Texture.createTexture(file.getPath(), true);
}
} else {
// unknown command - ignore it
}
}