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Topics - AGP

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Support / Programming Question (Bitwise OR)
« on: December 28, 2020, 09:08:48 pm »
Does it make any difference to bitwise OR 4278190080u and -16777216 (for alpha values) if the result will nevertheless be an unsigned int (I apologize in advance for the C#)?

Bones / BonesIO Question
« on: July 10, 2020, 06:56:38 am »
How is it that when you load your SkinClipSequences from a bones file instead of each SkinClip having identical Skeletons they each share the same instance of a Skeleton?

Support / Cpct?
« on: September 16, 2019, 06:45:59 pm »
Now that even Excelsior Jet has been made extinct, how would you feel about making a c# version of jpct? At least the OpenGL bits would be better.

Support / Mouse-Walking on a Simple Plane
« on: October 23, 2018, 06:59:02 am »
I've made three dozen attempts. I have had success on a plane with multiple polygons, but I'd like to make it work on a large plane with only two triangles. My best (unsuccesful) attempt:

Code: [Select]
     public void mouseClicked(MouseEvent e) {
        moveByMouse(e.getX(), e.getY());
     private void moveByMouse(int mouseX, int mouseY) {//WALKBYMOUSE; CALLED ONCE TO SETUP THE WALK DIRECTION
SimpleVector ray = Interact2D.reproject2D3DWS(camera, buffer, mouseX, mouseY);
if (ray != null) {
     SimpleVector norm = ray.normalize();

     float f = theWorld.calcMinDistance(camera.getPosition(), norm, 1000);
     if (1==1/*f != Object3D.COLLISION_NONE*/) {
SimpleVector offset = new SimpleVector(norm);
norm = norm.calcSub(offset);
origin = hero.getRoot().getTransformedCenter();
SimpleVector destination = new SimpleVector(norm);
destination.x += camera.getPosition().x;
destination.z += camera.getPosition().z;
destination.y = origin.y; // Make y the same as for the hero to avoid moving up/down.
this.destination = new SimpleVector(destination);
go = true;

Support / Orthographic Camera
« on: September 26, 2018, 05:35:15 am »
Is it at all possible to extend the Camera instance to create an orthographic camera?

Bones / getBindPose() is Late
« on: July 07, 2018, 08:32:52 pm »
Can I forcefully update it in order to have an item keep up with my character's hand?

Support / Asymmetrical Scaling
« on: June 21, 2018, 06:24:00 am »
I'm trying to create a flickering glow. To that end, I wrote the following thickening method in a vertex controller. The problem happens when the base object, from which the glow object is created, is rotated because the glow appears to be modified in worldspace as opposed to in objectspace. What should I do to calculate the x/z distortion in objectspace?

Code: [Select]
     public void thicken(final float deltaTime) {
SimpleVector[] vertices = this.getSourceMesh();
SimpleVector[] destination = this.getDestinationMesh();
for (int i = 0; i < vertices.length; i++) {
     SimpleVector v = vertices[i];
     v.x *= (1f+deltaTime);
     v.z *= (1f+deltaTime);
     destination[i] = v;

...of keyframes? You should put that in the docs.

For now, I'm going to assume that it is. ; )

Projects / 3ds Max OBJ Animation
« on: June 04, 2018, 06:43:14 pm »
I called this MergeAndSerialize because it first exports each frame of your character's animation as an OBJ (I did not write the included MaxScript), then it creates a single serialized file with a jpct animation. Hope it helps someone else:

Support / Merging OBJ Frames
« on: May 30, 2018, 11:49:33 am »
I'm about to post a little project for anyone unable to export either Ogre or MD2-animated versions of their models but are able to export OBJ or 3ds. I found a little maxscript that automates the exporting of the frames, and I'm writing the jpct end of it. Problem is I keep getting a size difference of 1 between frame 1 and all the rest ("ERROR: The sizes of the Animation's Meshes (26938) and the object's Mesh (26937) don't match!").

Code: [Select]
Written by AGP (BR) on May, 2018
import com.threed.jpct.*;

public class MergeAndSerialize {
     public static void main(String[] args) {
float SCALE = 3.6f;
String animationName = "Idle";
if (args == null || args.length < 1) {
     System.err.println("USAGE: java MergeAndSerialize [baseFileName] where the file name needs no extension.\nFOR OBJs ONLY.");
String fileName = args[0].trim();
FilenameFilter filter = new FilenameFilter() {
     public boolean accept(File dir, String name) {
return (name.startsWith(fileName) && name.toLowerCase().endsWith(".obj"));
String[] frames = new File("./").list(filter);
Object3D model = Object3D.mergeAll(Loader.loadOBJ(frames[0], frames[0].substring(0, frames[0].lastIndexOf("."))+".mtl", SCALE));
Animation animation = new Animation(frames.length);
System.out.println("\n\n\nFrames length: "+frames.length);;
for (int i = 1; i < frames.length; i++) {
System.out.println("I: "+i);
     Object3D frame = Object3D.mergeAll(Loader.loadOBJ(frames[i], frames[i].substring(0, frames[i].lastIndexOf("."))+".mtl", SCALE));;
     Mesh mesh = frame.getMesh();
try {
     new DeSerializer().serialize(model, new, fileName.lastIndexOf("."))+".serialized"), false);
catch ( ex) {System.err.println("Trouble saving file: "+ex.getMessage());}

Bones / Parsing SkinClipSequence
« on: May 04, 2018, 10:51:28 pm »
Since EasyOgreExporter exports all clips into a single animation, I'm forced to write a parser. How, then, might I split a SkinClipSequence of one SkinClip into a SkinClipSequence of two or more?

Support / Now this looks like a Java 10 Thing
« on: April 29, 2018, 11:45:19 pm »
I was working a while ago on this fire particle system. I don't remember the rendering getting clipped like this.

Code: [Select]
this.setSize(buffer.getOutputWidth(), buffer.getOutputHeight());
this.add(canvas, BorderLayout.CENTER);
     skyBox.render(theWorld, buffer);
     if (!doShadows()) {

Support / Java 10 Serialization
« on: April 25, 2018, 08:42:07 pm »
I think that you have to update the serialization stuff for Java 10. Would you?

Support / Documentation Error
« on: March 20, 2018, 09:40:16 pm »
The docs for Object3D state:

public Object3D(float[] coordinates,
                float[] normals,
                float[] uvs,
                int[] indices,
                int textureId)
uvs - the texture coordinates [u1,v1,u2,v2,...]

When in fact it seems to read ws too (thus being u1, v1, w1, u2, v2, w2...).

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