WebGL projection matrix not updated after pop()

[AidanNelson]

Nature of issue?

• Found a bug
• Existing feature enhancement
• New feature request

Most appropriate sub-area of p5.js?

• Color
• Core/Environment/Rendering
• Data
• Events
• Image
• IO
• Math
• Typography
• Utilities
• WebGL
• Other (specify if possible)

Which platform were you using when you encountered this?

• Mobile/Tablet (touch devices)
• Desktop/Laptop
• Others (specify if possible)

Details about the bug:

The projection matrix of the rendererGL doesn't update after a pop(). So, any perspective/ortho calls during a push/pop will remain until the following call to perspective() or ortho().

I will fix this as part of reorganizing camera functionality in webGL.

Below code should render the cubes in perspective projection, ortho projection, then perspective projection, but instead renders as perspective, ortho, ortho:

function setup() {
  createCanvas(windowWidth, windowHeight, WEBGL);
  camera(0, -200, 500, 0, 0, 0, 0, 1, 0);
  normalMaterial();
}

function draw() {
  perspective();
  // left
  push();
  translate(-120, 0, 0);
  fill(0, 200, 0);
  box(100);
  pop();

  // middle (w/ ortho projection)
  push();
  ortho();
  fill(0, 0, 200);
  box(100);
  pop();

  // right (should have perspective projection)
  translate(120, 0, 0);
  fill(200, 0, 0);
  box(100);
}

What we should see:

What we do see:

[stalgiag]

It seems like this could be fixed quite easily with a state property once #2961 is merged.

[AidanNelson]

Closed by #3080.