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This example is for Processing version 1.0+. If you have a previous version, use the examples included with your software. If you see any errors or have comments, please let us know.
Texture 1.
Load an image and draw it onto a quad. The texture() function sets the texture image. The vertex() function maps the image to the geometry.
PImage img;
void setup() {
size(640, 360, P3D);
img = loadImage("berlin-1.jpg");
noStroke();
}
void draw() {
background(0);
translate(width / 2, height / 2);
rotateY(map(mouseX, 0, width, -PI, PI));
rotateZ(PI/6);
beginShape();
texture(img);
vertex(-100, -100, 0, 0, 0);
vertex(100, -100, 0, 400, 0);
vertex(100, 100, 0, 400, 400);
vertex(-100, 100, 0, 0, 400);
endShape();
}