GL.Graphics - Add GLModels after setup || how to do it anyway :)

fridddd

GL.Graphics - Add GLModels after setup || how to do it anyway :)

in Contributed Library Questions • 1 year ago

Hello folks,

I've been experimenting with glgraphics because i need to have the models run on the gpu for obvious (speed) reasons but i am quite unsuccesful in my atempts to do so. In the attached code i have a glModel which is made up of class punt(), and is the point you see on the screen but if i try to add more than 1 there's is an "arrayindexoutofboundsexp: 4". Weird thing is, it's always four even when the array is not larger than 2. Why i don't know...

In the code you'll also see i add the point to glmodel inside the class, is it the "correct" way to instantiate the point like that? Create a glModel for every point seems too much, is there a way too create all the points seperate and bind them to a single glModel? Seems much more efficient. Also another question regarding the ammount of points. Can you change this in the draw function or is this a static ammount set only in the setup?
For example what if i have glModel test which is made up of class punt() which holds another class which itself is creating points, will they be automatically added to the glmodel too?

I hope i've been succesfull in explaining the questions. If not i can always try to elaborate :) Thanks for reading/helping (i hope ofcourse),
FRid

Almost forgot; why isn't the color working properly? Should be white right?

import processing.opengl.*;
import codeanticode.glgraphics.*;
import peasy.*;
PeasyCam cam;

GLModel test;

int num = 1;
color c = color(255,255,255);

void setup() {
size(500,500,GLConstants.GLGRAPHICS);

cam = new PeasyCam(this, 100);
cam.lookAt(0,0,0);

test = punt();
test.initColors();
test.beginUpdateVertices();
for (int i=0;i<num;i++) {
test.updateVertex(i,0,0,0);
}
test.endUpdateVertices();

test.beginUpdateColors();
for (int i=0;i<num;i++) {
test.updateColor(i,c);
}
test.endUpdateColors();
}

void draw() {
background(100);

GLGraphics renderer = (GLGraphics)g;
renderer.beginGL();
renderer.model(test);
renderer.endGL();

}
//Class---------------------------------------------------------------------------------------------------Class-------------

GLModel punt() {

float x = 0;
float y = 0;
float z = 0;

stroke(255);
point(x,y,z);

GLModel model = new GLModel(this, 1, POINTS, GLModel.DYNAMIC);
return model; //Doesn't really seem right doing this here. Better in the main program?

}

Replies(3)

andres

Re: GL.Graphics - Add GLModels after setup || how to do it anyway :)

1 year ago

Better use updateColor() setting the individual color components. Also, you don't need to put the model creation inside the class:

import processing.opengl.*;
import codeanticode.glgraphics.*;
import peasy.*;
PeasyCam cam;
GLModel test;
int num = 1000;
void setup() {
size(500,500,GLConstants.GLGRAPHICS);
cam = new PeasyCam(this, 100);
cam.lookAt(0,0,0);
test = new GLModel(this, num, POINTS, GLModel.DYNAMIC);
test.initColors();
test.beginUpdateVertices();
for (int i=0;i<num;i++) {
test.updateVertex(i, random(width), random(height), 0);
}
test.endUpdateVertices();
test.beginUpdateColors();
for (int i=0;i<num;i++) {
test.updateColor(i, 255, 255, 255);
}
test.endUpdateColors();
}
void draw() {
background(100);
GLGraphics renderer = (GLGraphics)g;
renderer.beginGL();
renderer.model(test);
renderer.endGL();
}

Answering to your other question: no, the size of GModel cannot be modified.

noncom

Re: GL.Graphics - Add GLModels after setup || how to do it anyway :)

1 year ago

Fridddd, please forgive me for the offtopic, but I could not miss that one - punt() is not a class, it is a method here. If you are only a beginner programmer or just starting with java, you could read a couple of pages on java classes and methods to gain some general overview of the toolset you are going to use.

fridddd

Re: GL.Graphics - Add GLModels after setup || how to do it anyway :)

1 year ago

Hello,

Thanks for the help there, guys! And like you say i was mixing up classes and methods. I am indeed a noob struggling along and unfortunately i have to admit i'm still struggling with this actually.

I've attached an example which is the simplified cpu-version of what i got running. Basically consisting of a class[], pointt, creating a new class, dott, every frame to an arraylist at the present location of (moving) pointt. I am quite in the dark about implementing this into gl. i guess a seperate glmodel for every class. I'll go see if i can tackle this, if not i'll be back...

Thanks,
FRid

- (probably real soon...)

import codeanticode.glgraphics.*;
import processing.opengl.*;
import peasy.*;

PeasyCam cam;

int num = 5;
pointt[] myPoint = new pointt[num];

void setup() {
size(500,500,GLConstants.GLGRAPHICS);

cam = new PeasyCam(this, 250);
cam.lookAt(250,250,0);

for (int i=0;i<num;i++) {
myPoint[i] = new pointt(0+i,0+i,0);
}
}

void draw() {

background(0);

for (int i=0;i<myPoint.length;i++) {
myPoint[i].run();
}

}
//Class 1----------------------------------------//

class pointt {

float x = 0;
float y = 0;
float z = 0;

float speedX = random(0.1,1.5);
float speedY = random(0.1,1.5);
float speedZ = random(0.1,1.5);

ArrayList myDots = new ArrayList();

pointt(float _x, float _y, float _z) {
    x = _x;
    y = _y;
    z = _z;

}

void run() {
    movee();
    addRunParticle();
    display();
}

void display() {
    stroke(255);
    point(x,y,z);
}

void movee() {

    x = (x+speedX) % width;
    y = (y+speedY) % height;
    z = (z+speedZ) % 250;

}

void addRunParticle() {

    dott myDot = new dott(x,y,z);
    myDots.add(myDot);

    for (int i=0;i<myDots.size();i++) {
      dott md = (dott) myDots.get(i);
      md.run();

      if (md.finished()) {
      // Items can be deleted with remove()
      myDots.remove(i);
    }
}
}

}
//Class 2------------------------------------------//

class dott {

float x = 0;
float y = 0;
float z = 0;

//float speedX = random(0.1,1.5);
//float speedY = random(0.1,1.5);
//float speedZ = random(0.1,1.5);

//float speedX = random(0.1,1.5);
//float speedY = 1;
//float speedZ = random(0.1,1.5);
float life = 250;

dott(float _x, float _y, float _z) {
    x = _x;
    y = _y;
    z = _z;
}

void run() {
    display();
}

void display() {
    stroke(255,150);
    point(x,y,z);

}

boolean finished() {
    // Balls fade out
    life--;
    if (life < 0) {
      return true;
    } else {
      return false;
    }
}

}

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