public double[] calculateIntensity(Point p, Vector normal, Point e) {
l = new Vector(position, p);
n = normal;
v = new Vector(e, p);
normalizeVectors();
calculateReflectionVector();
for (int color = 0; color < 3; color++) {
I[color] =
attenuation
* (Kd * L[color][DIFFUSE] * Math.max(Vector.dotProduct(l, n), 0)
+ Ks * L[color][SPECULAR] * Math.max(Math.pow(Vector.dotProduct(r, v), 2), 0))
+ Ka * L[color][AMBIENT];
}
return I;
}
public static Point intersectionPoint(Ray ray, Plane plane) {
Vector rayToPlaneVector = vectorBetween(ray.point, plane.point);
float scaleFactor =
rayToPlaneVector.dotProduct(plane.normal) / ray.vector.dotProduct(plane.normal);
Point intersectionPoint = ray.point.translate(ray.vector.scale(scaleFactor));
return intersectionPoint;
}
private void calculateReflectionVector() {
r =
Vector.add(
l,
Vector.multiplyVector(
n, (2 * Vector.dotProduct(l, n) / (Math.pow(n.getMagnitude(), 2))))
.neg());
r.normalize();
}
public void display(GLAutoDrawable drawable) {
update();
GL2 gl = drawable.getGL().getGL2();
// Clear Color Buffer, Depth Buffer
gl.glClear(GL2.GL_COLOR_BUFFER_BIT | GL2.GL_DEPTH_BUFFER_BIT);
Matrix TmpMatrix = new Matrix(); // Temporary MATRIX Structure ( NEW )
Vector TmpVector = new Vector(), TmpNormal = new Vector(); // Temporary
// VECTOR
// Structures
// ( NEW )
gl.glLoadIdentity(); // Reset The Matrix
if (outlineSmooth) { // Check To See If We Want Anti-Aliased Lines ( NEW
// )
gl.glHint(GL2.GL_LINE_SMOOTH_HINT, GL2.GL_NICEST); // Use The Good
// Calculations
// ( NEW )
gl.glEnable(GL2.GL_LINE_SMOOTH); // Enable Anti-Aliasing ( NEW )
} else
// We Don't Want Smooth Lines ( NEW )
gl.glDisable(GL2.GL_LINE_SMOOTH); // Disable Anti-Aliasing ( NEW )
gl.glTranslatef(0.0f, 0.0f, -2.0f); // Move 2 Units Away From The Screen
// ( NEW )
gl.glRotatef(modelAngle, 0.0f, 1.0f, 0.0f); // Rotate The Model On It's
// Y-Axis ( NEW )
gl.glGetFloatv(GLMatrixFunc.GL_MODELVIEW_MATRIX, TmpMatrix.Data, 0); // Get
// The
// Generated
// Matrix
// (
// NEW
// )
// Cel-Shading Code //
gl.glEnable(GL2.GL_TEXTURE_1D); // Enable 1D Texturing ( NEW )
gl.glBindTexture(GL2.GL_TEXTURE_1D, shaderTexture[0]); // Bind Our
// Texture ( NEW
// )
gl.glColor3f(1.0f, 1.0f, 1.0f); // Set The Color Of The Model ( NEW )
gl.glBegin(GL2.GL_TRIANGLES); // Tell OpenGL That We're Drawing
// Triangles
// Loop Through Each Polygon
for (int i = 0; i < polyNum; i++)
// Loop Through Each Vertex
for (int j = 0; j < 3; j++) {
// Fill Up The TmpNormal Structure With
TmpNormal.X = polyData[i].Verts[j].Nor.X;
// The Current Vertices' Normal Values
TmpNormal.Y = polyData[i].Verts[j].Nor.Y;
TmpNormal.Z = polyData[i].Verts[j].Nor.Z;
// Rotate This By The Matrix
TmpMatrix.rotateVector(TmpNormal, TmpVector);
// Normalize The New Normal
TmpVector.normalize();
// Calculate The Shade Value
float TmpShade = Vector.dotProduct(TmpVector, lightAngle);
// Clamp The Value to 0 If Negative ( NEW )
if (TmpShade < 0.0f) {
TmpShade = 0.0f;
}
// Set The Texture Co-ordinate As The Shade Value
gl.glTexCoord1f(TmpShade);
// Send The Vertex Position
gl.glVertex3f(
polyData[i].Verts[j].Pos.X, polyData[i].Verts[j].Pos.Y, polyData[i].Verts[j].Pos.Z);
}
gl.glEnd(); // Tell OpenGL To Finish Drawing
gl.glDisable(GL2.GL_TEXTURE_1D); // Disable 1D Textures ( NEW )
// Outline Code
// Check To See If We Want To Draw The Outline
if (outlineDraw) {
// Enable Blending
gl.glEnable(GL2.GL_BLEND);
// Set The Blend Mode
gl.glBlendFunc(GL2.GL_SRC_ALPHA, GL2.GL_ONE_MINUS_SRC_ALPHA);
// Draw Backfacing Polygons As Wireframes
gl.glPolygonMode(GL2.GL_BACK, GL2.GL_LINE);
// Set The Line Width
gl.glLineWidth(outlineWidth);
// Don't Draw Any Front-Facing Polygons
gl.glCullFace(GL2.GL_FRONT);
// Change The Depth Mode
gl.glDepthFunc(GL2.GL_LEQUAL);
// Set The Outline Color
gl.glColor3fv(outlineColor, 0);
// Tell OpenGL What We Want To Draw
gl.glBegin(GL2.GL_TRIANGLES);
// Loop Through Each Polygon
for (int i = 0; i < polyNum; i++) {
// Loop Through Each Vertex
for (int j = 0; j < 3; j++) {
// Send The Vertex Position
gl.glVertex3f(
polyData[i].Verts[j].Pos.X, polyData[i].Verts[j].Pos.Y, polyData[i].Verts[j].Pos.Z);
}
}
gl.glEnd(); // Tell OpenGL We've Finished
// Reset The Depth-Testing Mode
gl.glDepthFunc(GL2.GL_LESS);
// Reset The Face To Be Culled
gl.glCullFace(GL2.GL_BACK);
// Reset Back-Facing Polygon Drawing Mode
gl.glPolygonMode(GL2.GL_BACK, GL2.GL_FILL);
// Disable Blending
gl.glDisable(GL2.GL_BLEND);
}
// Check To See If Rotation Is Enabled
if (modelRotate) {
// Update Angle Based On The Clock
modelAngle += .2f;
}
}
@Test(expected = ArithmeticException.class)
public void dotTest_IllegalVectoy() {
infiniteVector1.dotProduct(nilVector);
}
@Test
public void dotTest_PerfectParameters() {
double vectorProduct = testVector1.dotProduct(testVector2);
assertTrue(Util.fuzzyEquals(vectorProduct, 0));
}
public double dotProduct(int sequencePosition, Vector weights) {
return weights.dotProduct(sequence[sequencePosition]);
}
@Override
public double dotProduct(Vector v) {
if (v instanceof SparseFloatVector)
return v.dotProduct(this); // actually do sparse product on other side
else return super.dotProduct(v);
}
