public RayTracer(Scene theScene, GL2 _gl, GLU _glu) {
System.out.println("Init RayTracer");
gl = _gl;
glu = _glu;
scene = theScene;
lights = scene.lights;
xMin = scene.camera.viewportLeft + 0.5;
xMax = scene.camera.viewportRight;
yMin = scene.camera.viewportBottom + 0.5;
yMax = scene.camera.viewportTop;
// Transform into camera coords
vpWidth = xMax - xMin;
vpHeight = yMax - yMin;
widthRatio = (scene.camera.windowRight - scene.camera.windowLeft) / vpWidth;
heightRatio = (scene.camera.windowTop - scene.camera.windowBottom) / vpHeight;
// Init the buffer
viewPort = new DoubleColor[(int) vpWidth + 1][(int) vpHeight + 1];
for (int i = 0; i < vpWidth; i++)
for (int j = 0; j < vpHeight; j++) viewPort[i][j] = new DoubleColor(0.0, 0.0, 0.0, 1.0);
numObjects = scene.objects.size();
shapes = new PMesh[numObjects];
spheres = new Sphere[numObjects];
// Loop through all objects in the scene and store them in the object so we don't need to access
// it from generic objects
for (int objNum = 0; objNum < numObjects; objNum++) {
shapes[objNum] = (PMesh) scene.objects.elementAt(objNum);
// Fill viewCoords of vertices
for (PMesh.SurfCell s = shapes[objNum].surfHead; s != null; s = s.next)
for (PMesh.PolyCell poly = s.polyHead; poly != null; poly = poly.next) {
Double3D v[] = new Double3D[3];
int j = 0;
try {
poly.viewNorm =
poly.normal.preMultiplyMatrix(
MatrixOps.inverseTranspose(
MatrixOps.multMat(scene.camera.viewMat, shapes[objNum].modelMat)));
} catch (Exception e) {
System.out.println("Matrix cannot be inverted");
}
for (PMesh.VertListCell vert = poly.vert; vert != null; vert = vert.next) {
// v[j] = shapes[objNum].vertArray.get(vert.vert).viewPos;
// Short circuit if possible
// if(calcViewCoords || (v[j].x == v[j].y && v[j].y == v[j].z && v[j].z == 0))
v[j] =
shapes[objNum]
.vertArray
.get(vert.vert)
.worldPos
.preMultiplyMatrix(shapes[objNum].modelMat);
v[j] = v[j].preMultiplyMatrix(scene.camera.viewMat);
shapes[objNum].vertArray.get(vert.vert).viewPos = v[j];
j++;
}
}
spheres[objNum] = new Sphere(shapes[objNum].boundingSphere);
// Apply the camera transform the point
spheres[objNum].center = spheres[objNum].center.preMultiplyMatrix(scene.camera.viewMat);
}
}
