private void readMesh() throws IOException {
InputStream in = ResourceRetriever.getResourceAsStream("demos/data/models/Model.txt");
polyNum = byteToInt(readNextFourBytes(in));
polyData = new Polygon[polyNum];
for (int i = 0; i < polyData.length; i++) {
polyData[i] = new Polygon();
for (int j = 0; j < 3; j++) {
polyData[i].Verts[j].Nor.X = byteToFloat(readNextFourBytes(in));
polyData[i].Verts[j].Nor.Y = byteToFloat(readNextFourBytes(in));
polyData[i].Verts[j].Nor.Z = byteToFloat(readNextFourBytes(in));
polyData[i].Verts[j].Pos.X = byteToFloat(readNextFourBytes(in));
polyData[i].Verts[j].Pos.Y = byteToFloat(readNextFourBytes(in));
polyData[i].Verts[j].Pos.Z = byteToFloat(readNextFourBytes(in));
}
}
}
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);
}
}
/**
* Loads a TGA file into memory
*
* @param gl
* @param texture
* @param filename
* @throws IOException
*/
private void loadTGA(GL gl, TextureImage texture, String filename) throws IOException {
// Used To Compare TGA Header
ByteBuffer TGAcompare = GLBuffers.newDirectByteBuffer(12);
// Uncompressed TGA Header
byte[] TGAheader = new byte[] {0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0};
ByteBuffer header = GLBuffers.newDirectByteBuffer(6); // First 6 Useful
// Bytes
// From The
// Header
int bytesPerPixel, // Holds Number Of Bytes Per Pixel Used In The TGA
// File
imageSize, // Used To Store The Image Size When Setting Aside Ram
type = GL.GL_RGBA; // Set The Default GL Mode To RBGA (32 BPP)
ReadableByteChannel file = null;
try {
file = Channels.newChannel(ResourceRetriever.getResourceAsStream(filename));
readBuffer(file, TGAcompare);
readBuffer(file, header);
for (int i = 0; i < TGAcompare.capacity(); i++)
// Does The Header Match What We Want?
if (TGAcompare.get(i) != TGAheader[i]) {
throw new IOException("Invalid TGA header");
}
texture.width = header.get(1) << 8 | header.get(0); // Determine The
// TGA
// Width(highbyte*256+lowbyte)
texture.height = header.get(3) << 8 | header.get(2); // Determine
// The TGA
// Height(highbyte*256+lowbyte)
if (texture.width <= 0) { // Is The Width Less Than Or Equal To Zero
throw new IOException("Image has negative width");
}
if (texture.height <= 0) { // Is The Height Less Than Or Equal To
// Zero
throw new IOException("Image has negative height");
}
if (header.get(4) != 24 && header.get(4) != 32) { // Is The TGA 24
// or 32 Bit?
throw new IOException("Image is not 24 or 32-bit");
}
texture.bpp = header.get(4); // Grab The TGA's Bits Per Pixel (24 or
// 32)
bytesPerPixel = texture.bpp / 8; // Divide By 8 To Get The Bytes Per
// Pixel
// Calculate the memory required for the TGA Data
imageSize = texture.width * texture.height * bytesPerPixel;
// Reserve memory to hold the TGA Data
texture.imageData = GLBuffers.newDirectByteBuffer(imageSize);
readBuffer(file, texture.imageData);
// Loop Through The Image Data
for (int i = 0; i < imageSize; i += bytesPerPixel) {
// Swaps The 1st And 3rd Bytes ('R'ed and 'B'lue)
// Temporarily Store The Value At Image Data 'i'
byte temp = texture.imageData.get(i);
// Set the 1st Byte to the value Of the 3rd Byte
texture.imageData.put(i, texture.imageData.get(i + 2));
// Set The 3rd Byte To The Value In 'temp' (1st Byte Value)
texture.imageData.put(i + 2, temp);
}
// Build A Texture From The Data
gl.glGenTextures(1, texture.texID, 0); // Generate OpenGL texture
// IDs
gl.glBindTexture(GL.GL_TEXTURE_2D, texture.texID[0]); // Bind Our
// Texture
gl.glTexParameterf(
GL.GL_TEXTURE_2D, GL.GL_TEXTURE_MIN_FILTER, GL.GL_LINEAR); // Linear Filtered
gl.glTexParameterf(
GL.GL_TEXTURE_2D, GL.GL_TEXTURE_MAG_FILTER, GL.GL_LINEAR); // Linear Filtered
if (texture.bpp == 24) // Was The TGA 24 Bits
type = GL.GL_RGB; // If So Set The 'type' To GL_RGB
gl.glTexImage2D(
GL.GL_TEXTURE_2D,
0,
type,
texture.width,
texture.height,
0,
type,
GL.GL_UNSIGNED_BYTE,
texture.imageData);
} finally {
if (file != null) {
try {
file.close();
} catch (IOException n) {
}
}
}
}
