private void initShaders(GL3 gl) {
final String[] vertSrc =
new String[] {
"#version 150\n",
"in vec4 vPosition;\n",
"in vec4 vColor;\n",
"out vec4 pColor;\n",
"void main() {\n",
" pColor = vColor;\n",
" gl_Position = vPosition;\n",
"}\n"
};
vertID = createShader(gl, GL3.GL_VERTEX_SHADER, vertSrc);
final String[] fragSrc =
new String[] {
"#version 150\n",
"in vec4 pColor;\n",
"void main() {\n",
" gl_FragColor = pColor;\n",
"}\n"
};
fragID = createShader(gl, GL3.GL_FRAGMENT_SHADER, fragSrc);
// We're done with the compiler
gl.glReleaseShaderCompiler();
progID = gl.glCreateProgram();
assert progID > 0;
gl.glAttachShader(progID, vertID);
gl.glAttachShader(progID, fragID);
gl.glLinkProgram(progID);
gl.glValidateProgram(progID);
}
/**
* Update this VBO with (potentially) new data.
*
* @param gl The global openGL instance.
* @param attribs One or more attributes that represent this VBO, @see GLSLAttrib
*/
public void update(GL3 gl, GLSLAttrib... attribs) {
this.attribs = attribs;
gl.glBindVertexArray(this.vboPointer.get(0));
gl.glBindBuffer(GL3.GL_ARRAY_BUFFER, this.bufferPointer.get(0));
// Allocate enough memory
int size = 0;
for (final GLSLAttrib attrib : attribs) {
size += attrib.buffer.capacity() * Buffers.SIZEOF_FLOAT;
}
gl.glBufferData(GL3.GL_ARRAY_BUFFER, size, (Buffer) null, GL3.GL_STATIC_DRAW);
// Copy the GLSL Attribute data into the internal OpenGL buffer
int nextStart = 0;
for (final GLSLAttrib attrib : attribs) {
gl.glBufferSubData(
GL3.GL_ARRAY_BUFFER,
nextStart,
attrib.buffer.capacity() * Buffers.SIZEOF_FLOAT,
attrib.buffer);
nextStart += attrib.buffer.capacity() * Buffers.SIZEOF_FLOAT;
}
}
/**
* Initialization method for any shader. Compiles and checks code.
*
* @param gl The global openGL instance.
* @throws CompilationFailedException If the compilation of the GLSL code generated any errors.
*/
public void init(GL3 gl) throws CompilationFailedException {
try {
// First, give the source to OpenGL and compile
gl.glShaderSource(getShaderPointer(), 1, source, (int[]) null, 0);
gl.glCompileShader(getShaderPointer());
// Receive compilation status
IntBuffer buf = Buffers.newDirectIntBuffer(1);
gl.glGetShaderiv(getShaderPointer(), GL3.GL_COMPILE_STATUS, buf);
int status = buf.get(0);
// Check the status
if (status == GL3.GL_FALSE) {
// Prepare for additional information
gl.glGetShaderiv(getShaderPointer(), GL3.GL_INFO_LOG_LENGTH, buf);
int logLength = buf.get(0);
byte[] reason = new byte[logLength];
// Get additional information
gl.glGetShaderInfoLog(getShaderPointer(), logLength, null, 0, reason, 0);
throw new CompilationFailedException(
"Compilation of " + filename + " failed, " + new String(reason));
}
} catch (UninitializedException e) {
logger.error(e.getMessage());
}
}
@Override
public void reshape(GLAutoDrawable glad, int x, int y, int w, int h) {
System.out.println("reshape() x: " + x + " y: " + y + " width: " + w + " height: " + h);
GL3 gl3 = glad.getGL().getGL3();
gl3.glViewport(x, y, w, h);
}
/** This method is called at the beginning of each frame, i.e., before scene drawing starts. */
private void beginFrame() {
// Set the active shader as default for this frame
gl.glUseProgram(activeShaderID);
// Clear color and depth buffer for the new frame
gl.glClear(GL3.GL_COLOR_BUFFER_BIT);
gl.glClear(GL3.GL_DEPTH_BUFFER_BIT);
}
private void displayVBOVAO(final GL3 gl) {
try {
gl.glBindVertexArray(vao);
gl.glDrawElements(GL3.GL_TRIANGLES, 3, GL3.GL_UNSIGNED_SHORT, 0L);
gl.glBindVertexArray(0);
} catch (GLException ex) {
Logger.getLogger(TestBug692GL3VAONEWT.class.getName()).log(Level.SEVERE, null, ex);
}
}
@Override
public void init(GLAutoDrawable drawable) {
super.init(drawable);
GL3 gl = drawable.getGL().getGL3();
gl.glClearColor(1, 1, 1, 1); // Hintergrundfarbe (RGBA)
fpsAnimator = new FPSAnimator(drawable, 60, true);
fpsAnimator.start();
}
@Override
public void dispose(GLAutoDrawable drawable) {
final GL3 gl = drawable.getGL().getGL3();
gl.glDeleteBuffers(2, new int[] {vbo, ibo}, 0);
gl.glDetachShader(progID, fragID);
gl.glDetachShader(progID, vertID);
gl.glDeleteProgram(progID);
gl.glDeleteShader(fragID);
gl.glDeleteShader(vertID);
}
@Override
public void display(GLAutoDrawable glad) {
System.out.println("display");
GL3 gl3 = glad.getGL().getGL3();
gl3.glClearColor(1.0f, 1.0f, 1.0f, 1.0f);
gl3.glClear(GL3.GL_COLOR_BUFFER_BIT);
programObject.bind(gl3);
{
programObject.setUniform(gl3, "offset", new float[] {0.5f, 0.5f}, 2);
gl3.glBindBuffer(GL3.GL_ARRAY_BUFFER, vertexBufferObject[0]);
gl3.glEnableVertexAttribArray(0);
gl3.glEnableVertexAttribArray(1);
{
gl3.glVertexAttribPointer(0, 4, GL3.GL_FLOAT, false, 0, 0);
gl3.glVertexAttribPointer(1, 4, GL3.GL_FLOAT, false, 0, 36 * 4 * 4);
gl3.glDrawArrays(GL3.GL_TRIANGLES, 0, 36);
}
gl3.glDisableVertexAttribArray(0);
gl3.glDisableVertexAttribArray(1);
}
programObject.unbind(gl3);
glad.swapBuffers();
}
private static int createShader(final GL3 gl, int type, final String[] srcLines) {
int shaderID = gl.glCreateShader(type);
assert shaderID > 0;
int[] lengths = new int[srcLines.length];
for (int i = 0; i < srcLines.length; i++) {
lengths[i] = srcLines[i].length();
}
gl.glShaderSource(shaderID, srcLines.length, srcLines, lengths, 0);
gl.glCompileShader(shaderID);
return shaderID;
}
private void initializeVertexBuffer(GL3 gl3) {
gl3.glGenBuffers(1, IntBuffer.wrap(vertexBufferObject));
gl3.glBindBuffer(GL3.GL_ARRAY_BUFFER, vertexBufferObject[0]);
{
FloatBuffer buffer = GLBuffers.newDirectFloatBuffer(vertexData);
gl3.glBufferData(GL3.GL_ARRAY_BUFFER, vertexData.length * 4, buffer, GL3.GL_STATIC_DRAW);
}
gl3.glBindBuffer(GL3.GL_ARRAY_BUFFER, 0);
}
@Override
public void reshape(GLAutoDrawable drawable, int x, int y, int width, int height) {
GL3 gl = drawable.getGL().getGL3();
// Set the viewport to be the entire window
gl.glViewport(0, 0, width, height);
float aspect = (float) height / width;
bottom = aspect * left;
top = aspect * right;
// ----- Projektionsmatrix festlegen -----
setOrthogonalProjection(gl, left, right, bottom, top, near, far);
}
@Override
public void init(GLAutoDrawable drawable) {
final GL3 gl = drawable.getGL().getGL3();
gl.glEnable(GL3.GL_DEPTH_TEST);
gl.glDisable(GL3.GL_CULL_FACE);
initBuffers(gl);
initShaders(gl);
vao = initVAO(gl);
gl.setSwapInterval(1);
}
public BackgroundShader(GL3 gl) {
super(gl, "/shaders/background");
// get indices of named attributes
vertexPositionID = gl.glGetAttribLocation(shaderProgram, "VertexPosition");
vertexTexCoord = gl.glGetAttribLocation(shaderProgram, "VertexTexCoord");
// get indices of uniform variables
modelViewProjectionMatrixID =
gl.glGetUniformLocation(shaderProgram, "ModelViewProjectionMatrix");
textureID = gl.glGetUniformLocation(shaderProgram, "Tex");
this.validateShader();
}
public void draw(GL3 gl, ShaderProgram program) {
vbo.bind(gl);
program.linkAttribs(gl, vbo.getAttribs());
gl.glDrawArrays(GL3.GL_POINTS, 0, numParticles);
}
/**
* Activate and use a given shader.
*
* @param s the shader to be activated
*/
@Override
public void useShader(Shader s) {
if (s != null) {
activeShaderID = ((GLShader) s).programId();
gl.glUseProgram(activeShaderID);
}
}
/**
* This constructor is called by {@link GLRenderPanel}.
*
* @param drawable the OpenGL rendering context. All OpenGL calls are directed to this object.
*/
public GLRenderContext(GLAutoDrawable drawable) {
// Some OpenGL initialization
gl = drawable.getGL().getGL3();
gl.glEnable(GL3.GL_DEPTH_TEST);
gl.glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
// Load and use the default shader
defaultShader = (GLShader) makeShader();
try {
defaultShader.load("../jrtr/shaders/default.vert", "../jrtr/shaders/default.frag");
} catch (Exception e) {
System.out.print("Problem with shader:\n");
System.out.print(e.getMessage());
}
useDefaultShader();
}
@Override
public void display(GLAutoDrawable drawable) {
GL3 gl = drawable.getGL().getGL3();
gl.glClear(GL3.GL_COLOR_BUFFER_BIT | GL3.GL_DEPTH_BUFFER_BIT);
// ------ Kamera-System -------
loadIdentity(gl);
setColor(0, 0, 0);
setShadingLevel(gl, 0);
setCameraSystem(gl, dCam, elevation, azimut);
drawAxis(gl, 50, 50, 50);
setColor(Color.RED);
t.add(new Vec3(sat1.x[0], sat1.x[1], sat1.x[2]));
sat1.draw(gl);
setColor(Color.BLUE);
t.draw(this, gl);
sat1.move(dt);
}
private void initBuffers(GL3 gl) {
// IDs for 2 buffers
int[] buffArray = new int[2];
gl.glGenBuffers(buffArray.length, buffArray, 0);
vbo = buffArray[0];
assert vbo > 0;
// Bind buffer and upload data
gl.glBindBuffer(GL3.GL_ARRAY_BUFFER, vbo);
gl.glBufferData(
GL3.GL_ARRAY_BUFFER,
vertexColorData.length * Buffers.SIZEOF_FLOAT,
vertexColorDataBuffer,
GL3.GL_STATIC_DRAW);
gl.glBindBuffer(GL3.GL_ARRAY_BUFFER, 0);
// Buffer with the 3 indices required for one triangle
ibo = buffArray[1];
assert ibo > 0;
gl.glBindBuffer(GL3.GL_ELEMENT_ARRAY_BUFFER, ibo);
gl.glBufferData(
GL3.GL_ELEMENT_ARRAY_BUFFER,
indices.length * Buffers.SIZEOF_SHORT,
indicesBuffer,
GL3.GL_STATIC_DRAW);
gl.glBindBuffer(GL3.GL_ELEMENT_ARRAY_BUFFER, 0);
}
private void setTransformation(Matrix4f transformation) {
// Compute the modelview matrix by multiplying the camera matrix and
// the transformation matrix of the object
Matrix4f modelview = new Matrix4f(sceneManager.getCamera().getCameraMatrix());
modelview.mul(transformation);
// Set modelview and projection matrices in shader
gl.glUniformMatrix4fv(
gl.glGetUniformLocation(activeShaderID, "modelview"),
1,
false,
transformationToFloat16(modelview),
0);
gl.glUniformMatrix4fv(
gl.glGetUniformLocation(activeShaderID, "projection"),
1,
false,
transformationToFloat16(sceneManager.getFrustum().getProjectionMatrix()),
0);
}
@Override
public void init(GLAutoDrawable glad) {
System.out.println("init");
canvas.setAutoSwapBufferMode(false);
GL3 gl3 = glad.getGL().getGL3();
buildShaders(gl3);
programObject.bind(gl3);
{
programObject.setUniform(gl3, "frustumScale", new float[] {1.0f}, 1);
programObject.setUniform(gl3, "zNear", new float[] {1.0f}, 1);
programObject.setUniform(gl3, "zFar", new float[] {3.0f}, 1);
}
programObject.unbind(gl3);
initializeVertexBuffer(gl3);
gl3.glGenVertexArrays(1, IntBuffer.wrap(vertexArrayObject));
gl3.glBindVertexArray(vertexArrayObject[0]);
gl3.glEnable(GL3.GL_CULL_FACE);
gl3.glCullFace(GL3.GL_BACK);
gl3.glFrontFace(GL3.GL_CW);
}
private void setTransformation(Matrix4f transformation) {
// Compute the modelview matrix by multiplying the camera matrix and
// the transformation matrix of the object
Matrix4f modelview = new Matrix4f(sceneManager.getCamera().getCameraMatrix());
modelview.mul(transformation);
// Set modelview and projection matrices in shader
gl.glUniformMatrix4fv(
gl.glGetUniformLocation(activeShaderID, "modelview"),
1,
false,
transformationToFloat16(modelview),
0);
gl.glUniformMatrix4fv(
gl.glGetUniformLocation(activeShaderID, "projection"),
1,
false,
transformationToFloat16(sceneManager.getFrustum().getProjectionMatrix()),
0);
int id = gl.glGetUniformLocation(activeShaderID, "camera");
if (id != -1) {
Vector3f cop = sceneManager.getCamera().getCenterOfProjection();
gl.glUniform4f(id, cop.x, cop.y, cop.z, 0);
}
// } else
// System.out.println("Could not get location of uniform variable camera");
}
/**
* This method is called by the GLRenderPanel to redraw the 3D scene. The method traverses the
* scene using the scene manager and passes each object to the rendering method.
*/
public void display(GLAutoDrawable drawable) {
// Get reference to the OpenGL rendering context
gl = drawable.getGL().getGL3();
gl.glPolygonMode(GL3.GL_FRONT_AND_BACK, GL3.GL_POINT);
// Do some processing at the beginning of the frame
beginFrame();
// Traverse scene manager and draw everything
SceneManagerIterator iterator = sceneManager.iterator();
while (iterator.hasNext()) {
RenderItem r = iterator.next();
if (r.getShape() != null
&& r.getShape()
.checkBoundingSphere(sceneManager.getFrustum(), sceneManager.getCamera(), r.getT())) {
draw(r);
}
}
// Do some processing at the end of the frame
endFrame();
}
/**
* A utility method to load vertex data into an OpenGL "vertex array object" (VAO) for efficient
* rendering. The VAO stores several "vertex buffer objects" (VBOs) that contain the vertex
* attribute data.
*
* @param data reference to the vertex data to be loaded into a VAO
*/
private void initArrayBuffer(GLVertexData data) {
// Make a vertex array object (VAO) for this vertex data
// and store a reference to it
GLVertexArrayObject vao = new GLVertexArrayObject(gl, data.getElements().size() + 1);
data.setVAO(vao);
// Bind (activate) the VAO for the vertex data in OpenGL.
// The subsequent OpenGL operations on VBOs will be recorded (stored)
// in the VAO.
vao.bind();
// Store all vertex attributes in vertex buffer objects (VBOs)
ListIterator<VertexData.VertexElement> itr = data.getElements().listIterator(0);
data.getVAO().rewindVBO();
while (itr.hasNext()) {
VertexData.VertexElement e = itr.next();
// Bind the vertex buffer object (VBO)
gl.glBindBuffer(GL3.GL_ARRAY_BUFFER, data.getVAO().getNextVBO());
// Upload vertex data
gl.glBufferData(
GL3.GL_ARRAY_BUFFER,
e.getData().length * 4,
FloatBuffer.wrap(e.getData()),
GL3.GL_DYNAMIC_DRAW);
}
// Bind the default vertex buffer objects
gl.glBindBuffer(GL3.GL_ARRAY_BUFFER, 0);
// Store the vertex data indices into the last vertex buffer
gl.glBindBuffer(GL3.GL_ELEMENT_ARRAY_BUFFER, data.getVAO().getNextVBO());
gl.glBufferData(
GL3.GL_ELEMENT_ARRAY_BUFFER,
data.getIndices().length * 4,
IntBuffer.wrap(data.getIndices()),
GL3.GL_DYNAMIC_DRAW);
// Bind the default vertex array object. This "deactivates" the VAO
// of the vertex data
gl.glBindVertexArray(0);
}
/**
* The main rendering method.
*
* @param renderItem the object that needs to be drawn
*/
private void draw(RenderItem renderItem) {
// Set the material of the shape to be rendered
setMaterial(renderItem.getShape().getMaterial());
// Get reference to the vertex data of the render item to be rendered
GLVertexData vertexData = (GLVertexData) renderItem.getShape().getVertexData();
// Check if the vertex data has been uploaded to OpenGL via a
// "vertex array object" (VAO). The VAO will store the vertex data
// in several "vertex buffer objects" (VBOs) on the GPU. We do this
// only once for performance reasons. Once the data is in the VBOs
// asscociated with a VAO, it is stored on the GPU and rendered more
// efficiently.
if (vertexData.getVAO() == null) {
initArrayBuffer(vertexData);
}
// Set modelview and projection matrices in shader (has to be done in
// every step, since they usually have changed)
setTransformation(renderItem.getT());
// Bind the VAO of this shape. This activates the VBOs that we
// associated with the VAO. We already loaded the vertex data into the
// VBOs on the GPU, so we do not have to send them again.
vertexData.getVAO().bind();
// Try to connect the vertex buffers to the corresponding variables
// in the current vertex shader.
// Note: This is not part of the vertex array object, because the active
// shader may have changed since the vertex array object was initialized.
// We need to make sure the vertex buffers are connected to the right
// variables in the shader
ListIterator<VertexData.VertexElement> itr = vertexData.getElements().listIterator(0);
vertexData.getVAO().rewindVBO();
while (itr.hasNext()) {
VertexData.VertexElement e = itr.next();
int dim = e.getNumberOfComponents();
// Bind the next vertex buffer object
gl.glBindBuffer(GL3.GL_ARRAY_BUFFER, vertexData.getVAO().getNextVBO());
// Tell OpenGL which "in" variable in the vertex shader corresponds
// to the current vertex buffer object.
// We use our own convention to name the variables, i.e.,
// "position", "normal", "color", "texcoord", or others if
// necessary.
int attribIndex = -1;
switch (e.getSemantic()) {
case POSITION:
attribIndex = gl.glGetAttribLocation(activeShaderID, "position");
break;
case NORMAL:
attribIndex = gl.glGetAttribLocation(activeShaderID, "normal");
break;
case COLOR:
attribIndex = gl.glGetAttribLocation(activeShaderID, "color");
break;
case TEXCOORD:
attribIndex = gl.glGetAttribLocation(activeShaderID, "texcoord");
break;
}
gl.glVertexAttribPointer(attribIndex, dim, GL3.GL_FLOAT, false, 0, 0);
gl.glEnableVertexAttribArray(attribIndex);
}
// Render the vertex buffer objects
gl.glDrawElements(
GL3.GL_TRIANGLES,
renderItem.getShape().getVertexData().getIndices().length,
GL3.GL_UNSIGNED_INT,
0);
// We are done with this shape, bind the default vertex array
gl.glBindVertexArray(0);
cleanMaterial(renderItem.getShape().getMaterial());
}
/** This method is called at the end of each frame, i.e., after scene drawing is complete. */
private void endFrame() {
// Flush the OpenGL pipeline
gl.glFlush();
}
/**
* Delete this VBO properly.
*
* @param gl The global openGL instance.
*/
public void delete(GL3 gl) {
gl.glBindVertexArray(0);
gl.glDeleteVertexArrays(1, this.vboPointer);
gl.glDeleteBuffers(1, this.bufferPointer);
}
/**
* Bind the VBO, so that it is ready for use.
*
* @param gl The global openGL instance.
*/
public void bind(GL3 gl) {
gl.glBindVertexArray(this.vboPointer.get(0));
gl.glBindBuffer(GL3.GL_ARRAY_BUFFER, bufferPointer.get(0));
}
/**
* Set up a material for rendering. Activate its shader, and pass the material properties,
* textures, and light sources to the shader.
*
* @param m the material to be set up for rendering
*/
private void setMaterial(Material m) {
// Set up the shader for the material, if it has one
if (m != null && m.shader != null) {
// Identifier for shader variables
int id;
// Activate the shader
useShader(m.shader);
// Activate the diffuse texture, if the material has one
if (m.diffuseMap != null) {
// OpenGL calls to activate the texture
gl.glActiveTexture(GL3.GL_TEXTURE0); // Work with texture unit 0
gl.glEnable(GL3.GL_TEXTURE_2D);
gl.glBindTexture(GL3.GL_TEXTURE_2D, ((GLTexture) m.diffuseMap).getId());
gl.glTexParameteri(GL3.GL_TEXTURE_2D, GL3.GL_TEXTURE_MAG_FILTER, GL3.GL_LINEAR);
gl.glTexParameteri(GL3.GL_TEXTURE_2D, GL3.GL_TEXTURE_MIN_FILTER, GL3.GL_LINEAR);
// We assume the texture in the shader is called "myTexture"
id = gl.glGetUniformLocation(activeShaderID, "myTexture");
gl.glUniform1i(
id,
0); // The variable in the shader needs to be set to the desired texture unit, i.e., 0
}
// Pass a default light source to shader
String lightString = "lightDirection[" + 0 + "]";
id = gl.glGetUniformLocation(activeShaderID, lightString);
if (id != -1) gl.glUniform4f(id, 0, 0, 1, 0.f); // Set light direction
else System.out.print("Could not get location of uniform variable " + lightString + "\n");
int nLights = 1;
// Iterate over all light sources in scene manager (overwriting the default light source)
Iterator<Light> iter = sceneManager.lightIterator();
Light l;
if (iter != null) {
nLights = 0;
while (iter.hasNext() && nLights < 8) {
l = iter.next();
// Pass light direction to shader, we assume the shader stores it in an array
// "lightDirection[]"
lightString = "lightDirection[" + nLights + "]";
id = gl.glGetUniformLocation(activeShaderID, lightString);
if (id != -1)
gl.glUniform4f(
id, l.direction.x, l.direction.y, l.direction.z, 0.f); // Set light direction
else System.out.print("Could not get location of uniform variable " + lightString + "\n");
nLights++;
}
// Pass number of lights to shader, we assume this is in a variable "nLights" in the shader
id = gl.glGetUniformLocation(activeShaderID, "nLights");
if (id != -1) gl.glUniform1i(id, nLights); // Set number of lightrs
// Only for debugging
// else
// System.out.print("Could not get location of uniform variable nLights\n");
}
}
}
/**
* Deletes this Texture from memory.
*
* @param gl The current OpenGL instance.
*/
public void delete(GL3 gl) {
gl.glDeleteTextures(1, pointer);
}
