final void startGeometry(Geometry geom) {
if (lineShader != null) lineShader.startGeometry(geom);
if (faceShader != null) faceShader.startGeometry(geom);
if (pointShader != null) pointShader.startGeometry(geom);
if (geom instanceof PointSet) {
vertexColor = ((PointSet) geom).getVertexAttributes(Attribute.COLORS);
vertexColors = vertexColor != null;
if (vertexColors) vertexColorLength = vertexColor.getStorageModel().getDimensions()[1];
// System.out.println("PolygonPipeline.startGeometry("+geom.getName()
// +"): colors: "+vertexColors);
} else {
vertexColor = null;
vertexColors = false;
}
}
private final void compute(int verticesLength) {
// boolean isTransparent = shader.getVertexShader().getTransparency() != 0.;
if (polygonCount + 1 >= this.polygons.length) increasePolygonCapacity();
Polygon p = polygons[polygonCount++];
p.length = verticesLength;
// We store the current shader for later shading
p.setShader(shader);
for (int i = 0; i < verticesLength; i++) {
p.vertices[i] = vertexCount;
vertexCount += Polygon.VERTEX_LENGTH;
}
// sky box shaders need the matrix...
environment.setMatrix(matrix);
// ****
shader.shadePolygon(p, vertexData, environment);
int numClip = environment.getNumClippingPlanes();
if (numClip > 0) {
ClippingPlaneSoft[] cp = environment.getClippingPlanes();
// Intersector.dehomogenize(p,vertexData);
for (int k = 0; k < numClip; k++) {
double d = VecMat.dot(cp[k].getNormal(), cp[k].getPoint());
// System.out.println("d "+d);
int res = Intersector.clipToHalfspace(p, cp[k].getNormal(), -1, d, this);
if (res == -1) { // clipped out
p.setShader(null);
vertexCount -= p.length * Polygon.VERTEX_LENGTH;
polygonCount--;
return;
}
}
}
for (int i = 0; i < p.length; i++) {
perspective.perspective(vertexData, p.vertices[i]);
}
boolean clippedAway = clipPolygon();
if (!clippedAway) {
// if (p.length == 0)
// System.out.println("ZEROLENGTH!");
// TODO: check wether we sort before computing this.
// boolean isTransparent = (shader.getVertexShader().getTransparency() !=
// 0.)||shader.hasTexture()||shader.interpolateAlpha();
// shader might have changed after lighting:
boolean isTransparent = p.getShader().needsSorting();
//// isTransparent = false;
if (triangulate) {
PolygonShader ps = p.getShader();
if (polygonCount + 1 >= this.polygons.length) increasePolygonCapacity();
polygonCount--;
for (int i = 0, pl = p.length - 2; i < pl; i++) {
Polygon pi = polygons[polygonCount++];
pi.length = 3;
pi.vertices[0] = p.vertices[0];
pi.vertices[1] = p.vertices[i + 1];
pi.vertices[2] = p.vertices[i + 2];
pi.setShader(ps);
if (queueOpaque || isTransparent) {
if (sortOpaque || isTransparent) pi.computeCenterZ(vertexData);
// pi.computeMaxZ(vertexData);
// return;
} else {
renderer.renderPolygon(pi, vertexData, ps.isOutline());
pi.setShader(null);
// TODO:check wether this is save
// vertexCount -= p.length * Polygon.VERTEX_LENGTH;
polygonCount--;
}
}
return;
} else {
if (queueOpaque || isTransparent) {
if (sortOpaque || isTransparent) p.computeCenterZ(vertexData);
// p.computeMaxZ(vertexData);
return;
} else {
renderer.renderPolygon(p, vertexData, p.getShader().isOutline());
}
}
}
// if the polygon was clipped completely or if the polygon was opaque and therefore
// rendered already, we can free its resources:
p.setShader(null);
vertexCount -= p.length * Polygon.VERTEX_LENGTH;
polygonCount--;
}