public Box() {
/*
* create the shader program. If OK, create vertex
* and fragment shaders
*/
shader = ARBShaderObjects.glCreateProgramObjectARB();
if (shader != 0) {
vertShader = createVertShader("shaders/hello-gl.v.glsl");
fragShader = createFragShader("shaders/hello-gl.f.glsl");
// skyFragShader=createFragShader("shaders/sky-gl.f.glsl");
} else useShader = false;
/*
* if the vertex and fragment shaders setup sucessfully,
* attach them to the shader program, link the sahder program
* (into the GL context I suppose), and validate
*/
if (vertShader != 0 && fragShader != 0) {
ARBShaderObjects.glAttachObjectARB(shader, vertShader);
ARBShaderObjects.glAttachObjectARB(shader, fragShader);
ARBShaderObjects.glLinkProgramARB(shader);
ARBShaderObjects.glValidateProgramARB(shader);
useShader = printLogInfo(shader, "attach");
} else useShader = false;
}
/*
* If the shader was setup succesfully, we use the shader. Otherwise
* we run normal drawing code.
*/
public void draw() {
if (useShader) {
ARBShaderObjects.glUseProgramObjectARB(shader);
}
GL11.glLoadIdentity();
GL11.glTranslatef(0.0f, 0.0f, -10.0f);
GL11.glColor3f(1.0f, 1.0f, 1.0f); // red
GL11.glBegin(GL11.GL_QUADS);
GL11.glVertex3f(-1.0f, 1.0f, 0.0f);
GL11.glVertex3f(1.0f, 1.0f, 0.0f);
GL11.glVertex3f(1.0f, -1.0f, 0.0f);
GL11.glVertex3f(-1.0f, -1.0f, 0.0f);
GL11.glEnd();
// GL11.glColor3f(0.0f, 1.0f, 0.0f);//green
// if(useShader) {
// ARBShaderObjects.glUseProgramObjectARB(fragShader);
// }
/*GL11.glBegin(GL11.GL_QUADS);
GL11.glVertex3f(-1.0f, 1.0f, 0.0f);
GL11.glVertex3f(1.0f, 1.0f, 0.0f);
GL11.glVertex3f(1.0f, -1.0f, 0.0f);
GL11.glVertex3f(-1.0f, -1.0f, 0.0f);
GL11.glEnd();*/
// release the shader
ARBShaderObjects.glUseProgramObjectARB(0);
}
// same as per the vertex shader except for method syntax
private int createFragShader(String filename) {
fragShader = ARBShaderObjects.glCreateShaderObjectARB(ARBFragmentShader.GL_FRAGMENT_SHADER_ARB);
if (fragShader == 0) {
return 0;
}
String fragCode = "";
String line;
try {
BufferedReader reader = new BufferedReader(new FileReader(filename));
while ((line = reader.readLine()) != null) {
fragCode += line + "\n";
}
} catch (Exception e) {
System.out.println("Fail reading fragment shading code" + filename);
return 0;
}
ARBShaderObjects.glShaderSourceARB(fragShader, fragCode);
ARBShaderObjects.glCompileShaderARB(fragShader);
if (!printLogInfo(fragShader, filename)) {
fragShader = 0;
}
return fragShader;
}
/*
* With the exception of syntax, setting up vertex and fragment shaders
* is the same.
* @param the name and path to the vertex shader
*/
private int createVertShader(String filename) {
// vertShader will be non zero if succefully created
vertShader = ARBShaderObjects.glCreateShaderObjectARB(ARBVertexShader.GL_VERTEX_SHADER_ARB);
// if created, convert the vertex shader code to a String
if (vertShader == 0) {
return 0;
}
String vertexCode = "";
String line;
try {
BufferedReader reader = new BufferedReader(new FileReader(filename));
while ((line = reader.readLine()) != null) {
vertexCode += line + "\n";
}
} catch (Exception e) {
System.out.println("Fail reading vertex shading code: " + filename);
return 0;
}
/*
* associate the vertex code String with the created vertex shader
* and compile
*/
ARBShaderObjects.glShaderSourceARB(vertShader, vertexCode);
ARBShaderObjects.glCompileShaderARB(vertShader);
// if there was a problem compiling, reset vertShader to zero
if (!printLogInfo(vertShader, filename)) {
vertShader = 0;
}
// if zero we won't be using the shader
return vertShader;
}
private static void updateShaderUniform(ShaderVariableFloat4 shaderUniform) {
ARBShaderObjects.glUniform4fARB(
shaderUniform.variableID,
shaderUniform.value1,
shaderUniform.value2,
shaderUniform.value3,
shaderUniform.value4);
}
private static boolean printLogInfo(int obj, String filename) {
IntBuffer iVal = BufferUtils.createIntBuffer(1);
ARBShaderObjects.glGetObjectParameterARB(
obj, ARBShaderObjects.GL_OBJECT_INFO_LOG_LENGTH_ARB, iVal);
int length = iVal.get();
if (length > 1) {
// We have some info we need to output.
ByteBuffer infoLog = BufferUtils.createByteBuffer(length);
iVal.flip();
ARBShaderObjects.glGetInfoLogARB(obj, iVal, infoLog);
byte[] infoBytes = new byte[length];
infoLog.get(infoBytes);
String out = new String(infoBytes);
System.out.println("Info log for " + filename + ":\n" + out);
} else return true;
return false;
}
private int createShader(final String filename, final int shaderType) throws Exception {
int shader = 0;
try {
shader = ARBShaderObjects.glCreateShaderObjectARB(shaderType);
if (shader == 0) {
return 0;
}
ARBShaderObjects.glShaderSourceARB(shader, this.readFileAsString(filename));
ARBShaderObjects.glCompileShaderARB(shader);
if (ARBShaderObjects.glGetObjectParameteriARB(
shader, ARBShaderObjects.GL_OBJECT_COMPILE_STATUS_ARB)
== GL11.GL_FALSE) {
throw new RuntimeException("Error creating shader: " + this.getLogInfo(shader));
}
return shader;
} catch (final Exception exc) {
ARBShaderObjects.glDeleteObjectARB(shader);
throw exc;
}
}
/**
* Update variableID for uniform shadervariable if needed.
*
* @param variable shadervaribale to update ID on
* @param programID shader program context ID
*/
public static void updateUniformLocation(ShaderVariable variable, int programID) {
if (variable.variableID == -1) {
ByteBuffer nameBuf = BufferUtils.createByteBuffer(variable.name.getBytes().length + 1);
nameBuf.clear();
nameBuf.put(variable.name.getBytes());
nameBuf.rewind();
variable.variableID = ARBShaderObjects.glGetUniformLocationARB(programID, nameBuf);
if (variable.variableID == -1) {
logger.severe("Shader uniform [" + variable.name + "] could not be located in shader");
}
}
}
public boolean initShader() {
int vertShader = 0, fragShader = 0;
try {
vertShader = this.createShader("./shaders/screen.vert", ARBVertexShader.GL_VERTEX_SHADER_ARB);
fragShader =
this.createShader("./shaders/screen.frag", ARBFragmentShader.GL_FRAGMENT_SHADER_ARB);
} catch (final Exception exc) {
exc.printStackTrace();
return false;
} finally {
if ((vertShader == 0) || (fragShader == 0)) {
return false;
}
}
this.program = ARBShaderObjects.glCreateProgramObjectARB();
if (this.program == 0) {
return false;
}
ARBShaderObjects.glAttachObjectARB(this.program, vertShader);
ARBShaderObjects.glAttachObjectARB(this.program, fragShader);
ARBShaderObjects.glLinkProgramARB(this.program);
if (ARBShaderObjects.glGetObjectParameteriARB(
this.program, ARBShaderObjects.GL_OBJECT_LINK_STATUS_ARB)
== GL11.GL_FALSE) {
System.err.println(this.getLogInfo(this.program));
return false;
}
ARBShaderObjects.glValidateProgramARB(this.program);
if (ARBShaderObjects.glGetObjectParameteriARB(
this.program, ARBShaderObjects.GL_OBJECT_VALIDATE_STATUS_ARB)
== GL11.GL_FALSE) {
System.err.println(this.getLogInfo(this.program));
return false;
}
return true;
}
private static void updateShaderUniform(ShaderVariableMatrix4 shaderUniform) {
shaderUniform.matrixBuffer.rewind();
ARBShaderObjects.glUniformMatrix4ARB(
shaderUniform.variableID, shaderUniform.rowMajor, shaderUniform.matrixBuffer);
}
private static void updateShaderUniform(ShaderVariableFloat shaderUniform) {
ARBShaderObjects.glUniform1fARB(shaderUniform.variableID, shaderUniform.value1);
}
private static void updateShaderUniform(ShaderVariableInt3 shaderUniform) {
ARBShaderObjects.glUniform3iARB(
shaderUniform.variableID, shaderUniform.value1, shaderUniform.value2, shaderUniform.value3);
}
private String getLogInfo(final int obj) {
return ARBShaderObjects.glGetInfoLogARB(
obj,
ARBShaderObjects.glGetObjectParameteriARB(
obj, ARBShaderObjects.GL_OBJECT_INFO_LOG_LENGTH_ARB));
}
public void render() {
final Dimension size = this.canvas.getSize();
if ((size.width > 0) && (size.height > 0)) {
if ((this.width != size.width) || (this.height != size.height)) {
this.width = size.width;
this.height = size.height;
GL11.glViewport(0, 0, this.width, this.height);
GL11.glMatrixMode(GL11.GL_PROJECTION);
GL11.glLoadIdentity();
final float c =
(float)
Math.sqrt(
(double) (this.width * this.width) + (double) (this.height * this.height));
GL11.glOrtho(0.0F, this.width, 0.0F, this.height, -c, c);
GL11.glMatrixMode(GL11.GL_MODELVIEW);
final boolean useShader = this.initShader();
if (ModelConstants.ENABLE_VERTEX_SHADER && useShader) {
ARBShaderObjects.glUseProgramObjectARB(this.program);
}
if (ModelConstants.ENABLE_LIGHTING) {
GL11.glEnable(GL11.GL_LIGHTING);
GL11.glEnable(GL11.GL_LIGHT0);
final FloatBuffer diffuse =
BufferUtils.createFloatBuffer(4).put(new float[] {1F, 1F, 1F, 1F});
final FloatBuffer position =
BufferUtils.createFloatBuffer(4).put(new float[] {3F, 0F, 1F, 0F});
final FloatBuffer ambient =
BufferUtils.createFloatBuffer(4).put(new float[] {.1F, .1F, .2F, .3F});
final FloatBuffer specular =
BufferUtils.createFloatBuffer(4).put(new float[] {1F, 1F, 1F, 1F});
GL11.glMaterial(GL11.GL_FRONT, GL11.GL_SPECULAR, (FloatBuffer) specular.flip());
GL11.glLight(GL11.GL_LIGHT0, GL11.GL_AMBIENT, (FloatBuffer) ambient.flip());
GL11.glLight(GL11.GL_LIGHT0, GL11.GL_DIFFUSE, (FloatBuffer) diffuse.flip());
GL11.glLight(GL11.GL_LIGHT0, GL11.GL_POSITION, (FloatBuffer) position.flip());
GL11.glMaterialf(GL11.GL_FRONT, GL11.GL_SHININESS, 50.0f);
}
}
if (Mouse.isButtonDown(0) && !Mouse.isButtonDown(1)) {
this.yaw -= Mouse.getDX();
this.pitch -= Mouse.getDY();
}
if (Mouse.isButtonDown(0) && Mouse.isButtonDown(1)) {
this.offset_z += Mouse.getDY();
}
float wheel = Mouse.getDWheel() / 960.0F;
if (wheel > 1.0F) {
wheel = 1.0F;
} else if (wheel < -1.0F) {
wheel = -1.0F;
}
this.scale -= this.scale * wheel;
if (this.scale < 0.01F) {
this.scale = 0.01F;
}
for (final Model3D dragonModel : this.getDragonList()) {
final float x = this.width / 1.2F;
final float y =
(-((100.0F * (this.scale))) + (this.offset_z + 0.1F))
+ ((this.height - dragonModel.height()) / 2.0F);
final float z = 0.0F;
dragonModel.calcDimms(false);
dragonModel.render(
x, y, z, this.pitch, this.yaw, this.roll, this.scale, this.scale, this.scale);
}
for (final Model3D torvaModel : this.getTorvaList()) {
final float x = this.width / 1.7F;
final float y =
(-((100.0F * (this.scale))) + this.offset_z)
+ ((this.height - torvaModel.height()) / 2.0F);
final float z = 0.0F;
torvaModel.calcDimms(false);
torvaModel.render(
x, y, z, this.pitch, this.yaw, this.roll, this.scale, this.scale, this.scale);
}
for (final Model3D jadModel : this.getJadList()) {
final float x = this.width / 3.2F;
final float y =
(-((100.0F * (this.scale))) + this.offset_z)
+ ((this.height - jadModel.height()) / 2.0F);
final float z = 0.0F;
jadModel.calcDimms(false);
jadModel.render(
x, y, z, this.pitch, this.yaw, this.roll, this.scale, this.scale, this.scale);
}
for (final Model3D trollModel : this.getTrollList()) {
final float x = this.width / 3.8F;
final float y =
(-((100.0F * (this.scale))) + this.offset_z)
+ ((this.height - trollModel.height()) / 2.0F);
final float z = 0.0F;
trollModel.calcDimms(false);
trollModel.render(
x, y, z, this.pitch, this.yaw, this.roll, this.scale, this.scale, this.scale);
}
if (ModelConstants.ENABLE_VERTEX_SHADER && this.initShader()) {
ARBShaderObjects.glUseProgramObjectARB(0);
}
Display.update();
}
}
