Initial Commit

Java/Processing/processing-3.3.6/modes/java/examples/Topics/Textures/TextureCylinder/TextureCylinder.pde

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+/**
+ * Texture Cylinder. 
+ * 
+ * Load an image and draw it onto a cylinder and a quad. 
+ */
+ 
+int tubeRes = 32;
+float[] tubeX = new float[tubeRes];
+float[] tubeY = new float[tubeRes];
+PImage img;
+
+void setup() {
+  size(640, 360, P3D);
+  img = loadImage("berlin-1.jpg");
+  float angle = 270.0 / tubeRes;
+  for (int i = 0; i < tubeRes; i++) {
+    tubeX[i] = cos(radians(i * angle));
+    tubeY[i] = sin(radians(i * angle));
+  }
+  noStroke();
+}
+
+void draw() {
+  background(0);
+  translate(width / 2, height / 2);
+  rotateX(map(mouseY, 0, height, -PI, PI));
+  rotateY(map(mouseX, 0, width, -PI, PI));
+  beginShape(QUAD_STRIP);
+  texture(img);
+  for (int i = 0; i < tubeRes; i++) {
+    float x = tubeX[i] * 100;
+    float z = tubeY[i] * 100;
+    float u = img.width / tubeRes * i;
+    vertex(x, -100, z, u, 0);
+    vertex(x, 100, z, u, img.height);
+  }
+  endShape();
+  beginShape(QUADS);
+  texture(img);
+  vertex(0, -100, 0, 0, 0);
+  vertex(100, -100, 0, 100, 0);
+  vertex(100, 100, 0, 100, 100);
+  vertex(0, 100, 0, 0, 100);
+  endShape();
+}