A 3D (raymarching) rendering engine. In java because i am speed

Nils Brugger

Last update: Dec 10, 2022

Related tags

Memory and concurrency JRender

Overview

JRender

This is a 3D PBR (phsical based rendering) engine completely done in java, based on raymarching.

Clarification

This project is an expermiment, do not do/use this for "in use" purposes.

The performance is (who could have guessed) terrible, it takes many secconds to render a HQ image.

The code is online for educational purposes only

Examples / Features

Light

Reflections

Height/Depth maps

Build and Run

Requires Java 11 to run (Java 16+ doesn't work at this stage).

To run the program execute:

./gradlew run

Enjoy, learn and have fun

High Performance Primitive Collections for Java

HPPC: High Performance Primitive Collections Collections of primitive types (maps, sets, stacks, lists) with open internals and an API twist (no java.

Dec 28, 2022

Java port of a concurrent trie hash map implementation from the Scala collections library

About This is a Java port of a concurrent trie hash map implementation from the Scala collections library. It is almost a line-by-line conversion from

Oct 31, 2022

Java library for the HyperLogLog algorithm

java-hll A Java implementation of HyperLogLog whose goal is to be storage-compatible with other similar offerings from Aggregate Knowledge. NOTE: This

Dec 30, 2022

A simple integer compression library in Java

JavaFastPFOR: A simple integer compression library in Java License This code is released under the Apache License Version 2.0 http://www.apache.org/li

Dec 30, 2022

jOOλ - The Missing Parts in Java 8 jOOλ improves the JDK libraries in areas where the Expert Group's focus was elsewhere. It adds tuple support, function support, and a lot of additional functionality around sequential Streams. The JDK 8's main efforts (default methods, lambdas, and the Stream API) were focused around maintaining backwards compatibility and implementing a functional API for parallelism.

jOOλ jOOλ is part of the jOOQ series (along with jOOQ, jOOX, jOOR, jOOU) providing some useful extensions to Java 8 lambdas. It contains these classes

Dec 31, 2022

Comments

feat: add multithreading

Adds multithreading. The rendering process is subdivided into PixelTasks. Each task contains the cordinates of a pixel and is pushed to a queue.

Rendering threads then consume this queue render the specific pixel and push the result into a "place onto screen" queue.

The last step is a thread whos task it is to consume the result queue and place the colors into a frame buffer

Depending on many factors you will experince a 20% to 20000% decrese in rendering time
enhancement

opened by nbrugger-tgm 1
./gradlew run with Java 11 produces an NPE (but the program then continues working)

./gradlew run

Task :run Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException at com.niton.render.RaymarchShader.resolveSurfaceColor(RaymarchShader.java:201) at com.niton.render.RaymarchShader.render(RaymarchShader.java:131) at com.niton.render.ui.SwingRender.paintComponent(SwingRender.java:41) at java.desktop/javax.swing.JComponent.paint(JComponent.java:1074) at java.desktop/javax.swing.JComponent.paintChildren(JComponent.java:907) at java.desktop/javax.swing.JComponent.paint(JComponent.java:1083) at java.desktop/javax.swing.JComponent.paintChildren(JComponent.java:907) at java.desktop/javax.swing.JComponent.paint(JComponent.java:1083) at java.desktop/javax.swing.JLayeredPane.paint(JLayeredPane.java:590) at java.desktop/javax.swing.JComponent.paintChildren(JComponent.java:907) at java.desktop/javax.swing.JComponent.paintToOffscreen(JComponent.java:5262) at java.desktop/javax.swing.RepaintManager$PaintManager.paintDoubleBufferedImpl(RepaintManager.java:1643) at java.desktop/javax.swing.RepaintManager$PaintManager.paintDoubleBuffered(RepaintManager.java:1618) at java.desktop/javax.swing.RepaintManager$PaintManager.paint(RepaintManager.java:1556) at java.desktop/javax.swing.RepaintManager.paint(RepaintManager.java:1323) at java.desktop/javax.swing.JComponent.paint(JComponent.java:1060) at java.desktop/java.awt.GraphicsCallback$PaintCallback.run(GraphicsCallback.java:39) at java.desktop/sun.awt.SunGraphicsCallback.runOneComponent(SunGraphicsCallback.java:78) at java.desktop/sun.awt.SunGraphicsCallback.runComponents(SunGraphicsCallback.java:115) at java.desktop/java.awt.Container.paint(Container.java:2002) at java.desktop/java.awt.Window.paint(Window.java:3940) at java.desktop/javax.swing.RepaintManager$4.run(RepaintManager.java:876) at java.desktop/javax.swing.RepaintManager$4.run(RepaintManager.java:848) at java.base/java.security.AccessController.doPrivileged(Native Method) at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85) at java.desktop/javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:848) at java.desktop/javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:823) at java.desktop/javax.swing.RepaintManager.prePaintDirtyRegions(RepaintManager.java:772) at java.desktop/javax.swing.RepaintManager$ProcessingRunnable.run(RepaintManager.java:1890) at java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:313) at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:770) at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:721) at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:715) at java.base/java.security.AccessController.doPrivileged(Native Method) at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85) at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:740) at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:203) at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124) at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113) at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109) at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101) at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90)

opened by karianna 1
pref: texture and map preloading
Refactored the texture loading system:

smaller memory footprint

accelerated access time of UV cords

concurrent asset access (better multithreading performance)

How? Images (maps) are now loaded and normalized into 1d float arrays. Therefore uv's can now be accessed by just 1 to 3 index-reads.

additionaly the system is now much easier to use and extend than before
enhancement
opened by nbrugger-tgm 0