/**
* Draws only the vertices of the given shape in white. Normals and indices are ignored. TODO:
* negative W are possible, fix plx?
*
* @param shape
* @param t
*/
private void drawDotty(Shape shape, Matrix4f t) {
float[] points = null, colors = null;
for (VertexElement ve : shape.getVertexData().getElements()) {
switch (ve.getSemantic()) {
case POSITION:
points = ve.getData();
break;
case COLOR:
colors = ve.getData();
break;
case NORMAL:
// DO NOT WANT
break;
case TEXCOORD:
// DO NOT WANT
break;
}
}
for (int i = 0; i < points.length; i += 3) {
Point4f v = new Point4f(points[i], points[i + 1], points[i + 2], 1);
Color3f c = new Color3f(colors[i], colors[i + 1], colors[i + 2]);
t.transform(v);
int x = Math.round(v.x / v.w);
int y = Math.round(v.y / v.w);
if (x >= 0 && y >= 0 && y < colorBuffer.getHeight() && x < colorBuffer.getWidth())
drawPointAt(x, y, c.get().getRGB());
}
}
/**
* Draws all triangles given in <code>indices</code> of the given shape. Ignores normals.
*
* @param shape that is about to be drawn
* @param t accumulated transformation matrix for this shape
*/
private void drawTrianglesSeparately(Shape shape, Matrix4f t) {
VertexData vertexData = shape.getVertexData();
Point4f[] positions = new Point4f[3];
Color3f[] colors = new Color3f[3];
Point2f[] texCoords = new Point2f[3];
int k = 0; // keeps track of triangle
int[] indices = vertexData.getIndices();
for (int i = 0; i < indices.length; i++) {
for (VertexElement ve : vertexData.getElements()) {
Point4f p;
switch (ve.getSemantic()) {
case POSITION:
p = getPointAt(ve.getData(), indices[i]);
t.transform(p);
positions[k] = p;
k++; // increment k here, bc color and normal might be missing
break;
case COLOR:
colors[k] = getColorAt(ve.getData(), indices[i]);
;
break;
case NORMAL:
// dont care
// normals[k] = getPointAt(ve, indices[i]);;
break;
case TEXCOORD:
texCoords[k] = getTexCoordAt(ve.getData(), indices[i]);
break;
}
}
if (k == 3) {
rasterizeTriangle(positions, colors, texCoords, shape.getMaterial());
k = 0;
}
}
}
