I have 2 questions about P3D geometry

kellen

The first is about triangle strips. When I try to draw one it gives me the message: "Only GROUP, PShape.PATH, and PShape.GEOMETRY work with createShape()" for something like:

void setup(){
  size(1080,720,P3D);
}

void draw(){
  stroke(255);
  fill(255,0,0);    

  createShape(TRIANGLE_STRIP);      
  vertex(-100,0,100);
  vertex(-100,0,-100);
  vertex(100,0,100);
  vertex(100,0,-100);
  endShape(CLOSE); 
}

The second is about texture mapping. I am trying to put an image onto a sphere but also have other shapes that rely on fill(). I tried putting the fill in pushmatrix and popmatrix but it fills the globe anyway.

import peasy.*;

PeasyCam cam;
PImage img;
PShape globe;

void setup(){
  cam = new PeasyCam(this,700);
  img = loadImage("starmap_8k.jpg");
  size(1080,720,P3D);
}

void draw(){
  pushMatrix();
  fill(255,0,0);
  popMatrix();

  globe=createShape(SPHERE,4000);
  globe.setTexture(img);
  noStroke();
  shape(globe);  
}

Chrisir

First

look at reference createShape and beginShape

float a;
void setup() { 
  size(1080, 720, P3D);
  background(0);
}

void draw() { 
  background(0);
  lights();

  translate(333, 333);
  rotateX(a);
  a+=.01;
  stroke(255); 
  fill(255, 0, 0);

  //createShape(TRIANGLE_STRIP);
  createShape();
  beginShape(TRIANGLE_STRIP);
  vertex(-100, 0, 100);
  vertex(-100, 0, -100);
  vertex(100, 0, 100);
  vertex(100, 0, -100);
  endShape(CLOSE);
}

Second

pushMartix/popMatrix doesn't isolate colors, only the Matrix

better define globe in setup()

import peasy.*; 

PeasyCam cam; 
PImage img; 
PShape globe;

void setup() {
  size(1080, 720, P3D);

  cam = new PeasyCam(this, 700);
  img = loadImage("unnamed.jpg");

  sphereDetail(44);

  background(0);


  globe=createShape(SPHERE, 4000);
  globe.setFill(false);
  globe.setStroke(false);
  globe.setTexture(img);
}

void draw() {
  background(0);
  lights();

  shape(globe);

  pushMatrix();
  noStroke();
  fill(255, 0, 0);
  sphere(26);
  popMatrix();
}