Applying the same texture to multiple shapes

Core Library Questions

RyanJP

Applying the same texture to multiple shapes

in Core Library Questions • 1 month ago

Is this possible? I figured it would save memory but it doesn't seem to work. I can easily just make multiple texture variables but then I'd have to load the same movie 3 times... anyway I'm sure this is possible, here's what I have so far-

import processing.video.*;
Movie waves;
float radius, step;
int points, numShapes;
void setup() {
size(1280, 720, P2D);
background(0);
waves = new Movie(this, "kaleida.mov");
waves.loop();
radius = 200;
points = 3;
shapes = 3;
step = TAU / points;
}
void draw() {
background(0);
for(int h = 0; h < numShapes; h++){
pushMatrix();
stroke(255);
strokeWeight(2);
translate(width/2, height/2);
textureMode(NORMAL);
beginShape();
texture(waves);
rotate(h*45);
for (int i = 0; i < points+1; i++) {
float theta = step * i;
float x = (cos(theta) * radius) + radius;
float y = (sin(theta) * radius) + radius;
float tx = x/waves.width+0.5;
float ty = y/waves.height+0.5;
vertex(x, y, tx, ty);
}
endShape();
popMatrix();
}
frame.setTitle(int(frameRate) + " fps");
}
void movieEvent(Movie m) {
m.read();
}

Replies(3)

RyanJP

Re: Applying the same texture to multiple shapes

1 month ago

I'm guessing the answer is to just draw all the shapes as points within one shape...

andres

Re: Applying the same texture to multiple shapes

1 month ago

you should be able to apply the same texture to several shapes, i.e.:

beginShape(QUADS);
texture(tex);
...
endShape();
beginShape(QUAD_STRIP)
texture(tex); // same texture object as before
...
endShape();

Is this not working in your sketch?

amnon.owed

Re: Applying the same texture to multiple shapes

1 month ago

I think the problem here is not applying the texture to multiple shapes, but rather drawing multiple shapes on top of each other. You can't use rotate() within a beginShape()-endShape(). You should move it outside/before these calls. In addition you might want to use radians() on the number before using it in rotate(). In addition you can move all the calls that apply to all shapes outside the for loop, which are lines 27, 28, 29 and 30, some of which may be even moved to setup().

Top Reply