public Vector transform(Vector point) {
double tempX =
(matrix.get(0, 0) * point.X()) + (matrix.get(1, 0) * point.Y() + matrix.get(2, 0));
double tempY =
(matrix.get(0, 1) * point.X()) + (matrix.get(1, 1) * point.Y() + matrix.get(2, 1));
return new Vector(tempX, tempY);
}
public void rotate(Vector heading, Vector side) {
matrix =
matrix.mult(
new SimpleMatrix(
new double[][] {
{heading.X(), heading.Y(), 0},
{side.X(), side.Y(), 0},
{0, 0, 1}
}));
}
public static Matrix lookAtLH(Vector eye, Vector target, Vector up) {
Matrix res = new Matrix();
Vector zaxis = Vector.sub(target, eye).normalize();
if (zaxis.length() == 0) zaxis.Z = 1;
Vector xaxis = Vector.cross(up, zaxis).normalize();
if (xaxis.length() == 0) {
zaxis.X += 0.000001;
xaxis = Vector.cross(up, zaxis).normalize();
}
Vector yaxis = Vector.cross(zaxis, xaxis);
res.m[0] = xaxis.X;
res.m[1] = xaxis.Y;
res.m[2] = xaxis.Z;
res.m[3] = -Vector.dot(xaxis, eye);
res.m[4] = yaxis.X;
res.m[5] = yaxis.Y;
res.m[6] = yaxis.Z;
res.m[7] = -Vector.dot(yaxis, eye);
res.m[8] = zaxis.X;
res.m[9] = zaxis.Y;
res.m[10] = zaxis.Z;
res.m[11] = -Vector.dot(zaxis, eye);
// already set during initialization of matrix
/*
* res.m[12] = 0; res.m[13] = 0; res.m[14] = 0; res.m[15] = 1;
*/
return res;
}
public void rotateVector(Vector V, Vector D) { // Rotate A Vector Using
// The Supplied Matrix (
// NEW )
// Rotate Around The X Axis ( NEW )
D.X = (Data[0] * V.X) + (Data[4] * V.Y) + (Data[8] * V.Z);
// Rotate Around The Y Axis ( NEW)
D.Y = (Data[1] * V.X) + (Data[5] * V.Y) + (Data[9] * V.Z);
// Rotate Around The Z Axis ( NEW )
D.Z = (Data[2] * V.X) + (Data[6] * V.Y) + (Data[10] * V.Z);
}
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;
}
}
public void init(GLAutoDrawable drawable) {
GL2 gl = drawable.getGL().getGL2();
// Storage for the 96 Shader Values ( NEW )
FloatBuffer shaderData = GLBuffers.newDirectFloatBuffer(96);
// Start Of User Initialization
// Really Nice perspective calculations Light Grey Background
gl.glHint(GL2.GL_PERSPECTIVE_CORRECTION_HINT, GL2.GL_NICEST);
gl.glClearColor(0.7f, 0.7f, 0.7f, 0.0f);
// Depth Buffer Setup
gl.glClearDepth(1.0f);
// Enable Depth Testing
gl.glEnable(GL2.GL_DEPTH_TEST);
// The Type Of Depth Test To Do
gl.glDepthFunc(GL2.GL_LESS);
// Enables Smooth Color Shading ( NEW )
gl.glShadeModel(GL2.GL_SMOOTH);
// Initially Disable Line Smoothing ( NEW )
gl.glDisable(GL2.GL_LINE_SMOOTH);
// Enable OpenGL Face Culling ( NEW )
gl.glEnable(GL2.GL_CULL_FACE);
// Disable OpenGL Lighting ( NEW )
gl.glDisable(GL2.GL_LIGHTING);
StringBuffer readShaderData = new StringBuffer();
try {
InputStream inputStream =
ResourceRetriever.getResourceAsStream("demos/data/models/Shader.txt");
int info;
while ((info = inputStream.read()) != -1) readShaderData.append((char) info);
inputStream.close();
} catch (IOException e) {
e.printStackTrace();
throw new RuntimeException(e);
}
StringTokenizer tokenizer = new StringTokenizer(readShaderData.toString());
// Loop Though The 32 Greyscale Values
while (tokenizer.hasMoreTokens()) {
float value = Float.parseFloat(tokenizer.nextToken());
shaderData.put(value);
shaderData.put(value);
shaderData.put(value);
}
shaderData.flip();
gl.glGenTextures(1, shaderTexture, 0); // Get A Free Texture ID ( NEW )
gl.glBindTexture(GL2.GL_TEXTURE_1D, shaderTexture[0]); // Bind This
// Texture. From
// Now On It
// Will Be 1D
// For Crying Out Loud Don't Let OpenGL Use Bi/Trilinear Filtering!
gl.glTexParameteri(GL2.GL_TEXTURE_1D, GL2.GL_TEXTURE_MAG_FILTER, GL2.GL_NEAREST);
gl.glTexParameteri(GL2.GL_TEXTURE_1D, GL2.GL_TEXTURE_MIN_FILTER, GL2.GL_NEAREST);
gl.glTexImage1D(
GL2.GL_TEXTURE_1D, 0, GL2.GL_RGB, 32, 0, GL2.GL_RGB, GL2.GL_FLOAT, shaderData); // Upload
// Set The X Direction
lightAngle.X = 0.0f;
// Set The Y Direction
lightAngle.Y = 0.0f;
// Set The Z Direction
lightAngle.Z = 1.0f;
lightAngle.normalize();
try {
// Return The Value Of ReadMesh
readMesh();
} catch (IOException e) {
throw new RuntimeException(e);
}
}
