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package com.jogamp.opencl.demos.julia3d;
import com.jogamp.opencl.demos.julia3d.structs.RenderingConfig;
import com.jogamp.opengl.util.awt.TextRenderer;
import java.awt.Canvas;
import java.awt.Font;
import java.nio.FloatBuffer;
import java.util.Timer;
import java.util.TimerTask;
import javax.media.opengl.GL2;
import javax.media.opengl.GLAutoDrawable;
import javax.media.opengl.GLCapabilities;
import javax.media.opengl.GLEventListener;
import javax.media.opengl.GLProfile;
import javax.media.opengl.awt.GLCanvas;
import static com.jogamp.common.nio.Buffers.*;
import static javax.media.opengl.GL2.*;
import static java.lang.String.*;
/**
* JOGL renderer for displaying the julia set.
* @author Michael Bien
*/
public class Renderer implements GLEventListener {
public final static int MU_RECT_SIZE = 80;
private final Julia3d julia3d;
private final GLCanvas canvas;
private final RenderingConfig config;
private final FloatBuffer juliaSlice;
private final UserSceneController usi;
private final TextRenderer textRenderer;
private TimerTask task;
private final Timer timer;
public Renderer(final Julia3d julia3d) {
this.julia3d = julia3d;
this.config = julia3d.config;
timer = new Timer(true);
juliaSlice = newDirectFloatBuffer(MU_RECT_SIZE * MU_RECT_SIZE * 4);
canvas = new GLCanvas(new GLCapabilities(GLProfile.get(GLProfile.GL2)));
canvas.addGLEventListener(this);
usi = new UserSceneController();
usi.init(this, canvas, config);
textRenderer = new TextRenderer(new Font("Helvetica", Font.BOLD, 14), true, true, null, false);
}
public void init(GLAutoDrawable drawable) {
drawable.getGL().getGL2().glMatrixMode(GL_PROJECTION);
}
void update() {
julia3d.update(false);
canvas.display();
}
public void display(GLAutoDrawable drawable) {
//compute
julia3d.compute(config.getActvateFastRendering() == 1);
GL2 gl = drawable.getGL().getGL2();
gl.glClear(GL_COLOR_BUFFER_BIT);
// draw julia set
gl.glRasterPos2i(0, 0);
gl.glDrawPixels(config.getWidth(), config.getHeight(), GL_RGB, GL_FLOAT, julia3d.getPixelBuffer());
// Draw Mu constant
int width = config.getWidth();
int height = config.getHeight();
float[] mu = config.getMu();
gl.glEnable(GL_BLEND);
gl.glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
int baseMu1 = width - MU_RECT_SIZE - 2;
int baseMu2 = 1;
drawJuliaSlice(gl, baseMu1, baseMu2, mu[0], mu[1]);
int baseMu3 = width - MU_RECT_SIZE - 2;
int baseMu4 = MU_RECT_SIZE + 2;
drawJuliaSlice(gl, baseMu3, baseMu4, mu[2], mu[3]);
gl.glDisable(GL_BLEND);
gl.glColor3f(1, 1, 1);
int mu1 = (int) (baseMu1 + MU_RECT_SIZE * (mu[0] + 1.5f) / 3.f);
int mu2 = (int) (baseMu2 + MU_RECT_SIZE * (mu[1] + 1.5f) / 3.f);
gl.glBegin(GL_LINES);
gl.glVertex2i(mu1 - 4, mu2);
gl.glVertex2i(mu1 + 4, mu2);
gl.glVertex2i(mu1, mu2 - 4);
gl.glVertex2i(mu1, mu2 + 4);
gl.glEnd();
int mu3 = (int) (baseMu3 + MU_RECT_SIZE * (mu[2] + 1.5f) / 3.f);
int mu4 = (int) (baseMu4 + MU_RECT_SIZE * (mu[3] + 1.5f) / 3.f);
gl.glBegin(GL_LINES);
gl.glVertex2i(mu3 - 4, mu4);
gl.glVertex2i(mu3 + 4, mu4);
gl.glVertex2i(mu3, mu4 - 4);
gl.glVertex2i(mu3, mu4 + 4);
gl.glEnd();
// info text
textRenderer.beginRendering(width, height);
textRenderer.draw(format("Epsilon %.5f - Max. Iter. %d", config.getEpsilon(), config.getMaxIterations()), 8, 10);
textRenderer.draw(format("Mu = (%.3f, %.3f, %.3f, %.3f)", mu[0], mu[1], mu[2], mu[3]), 8, 25);
textRenderer.draw(format("Shadow %s - SuperSampling %dx%d - Fast rendering %s",
config.getEnableShadow() == 1 ? "on" : "off",
config.getSuperSamplingSize(), config.getSuperSamplingSize(),
config.getActvateFastRendering() == 1 ? "on" : "off"), 8, 40);
textRenderer.endRendering();
// timer task scheduling, delay gpu intensive high quality rendering
if(task != null) {
task.cancel();
}
if(config.getActvateFastRendering() == 1) {
task = new TimerTask() {
@Override
public void run() {
config.setActvateFastRendering(0);
update();
config.setActvateFastRendering(1);
}
};
timer.schedule(task, 2000);
}
}
private void drawJuliaSlice(GL2 gl, int origX, int origY, float cR, float cI) {
int index = 0;
float invSize = 3.0f / MU_RECT_SIZE;
for (int i = 0; i < MU_RECT_SIZE; ++i) {
for (int j = 0; j < MU_RECT_SIZE; ++j) {
float x = i * invSize - 1.5f;
float y = j * invSize - 1.5f;
int iter;
for (iter = 0; iter < 64; ++iter) {
float x2 = x * x;
float y2 = y * y;
if (x2 + y2 > 4.0f) {
break;
}
float newx = x2 - y2 + cR;
float newy = 2.f * x * y + cI;
x = newx;
y = newy;
}
juliaSlice.put(index++, iter / 64.0f);
juliaSlice.put(index++, 0.0f);
juliaSlice.put(index++, 0.0f);
juliaSlice.put(index++, 0.5f);
}
}
gl.glRasterPos2i(origX, origY);
gl.glDrawPixels(MU_RECT_SIZE, MU_RECT_SIZE, GL_RGBA, GL_FLOAT, juliaSlice);
}
public void reshape(GLAutoDrawable drawable, int x, int y, int newWidth, int newHeight) {
config.setWidth(newWidth);
config.setHeight(newHeight);
GL2 gl = drawable.getGL().getGL2();
gl.glViewport(0, 0, newWidth, newHeight);
gl.glLoadIdentity();
gl.glOrtho(-0.5f, newWidth - 0.5f, -0.5f, newHeight - 0.5f, -1.0f, 1.0f);
julia3d.update(true);
}
public void dispose(GLAutoDrawable drawable) {
}
public Canvas getCanvas() {
return canvas;
}
}
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