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Adding new round of examples
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‎content/examples/3D and OpenGL/Camera/MoveEye/MoveEye.pde‎

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/**
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* Move Eye.
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* by Simon Greenwold.
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*
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* The camera lifts up (controlled by mouseY) while looking at the same point.
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*
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* Created 27 May 2007
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*/
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void setup() {
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size(400, 400, P3D);
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fill(204);
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}
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void draw() {
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lights();
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background(0);
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// Change height of the camera with mouseY
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camera(30.0, mouseY, 220.0, // eyeX, eyeY, eyeZ
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0.0, 0.0, 0.0, // centerX, centerY, centerZ
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0.0, 1.0, 0.0); // upX, upY, upZ
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noStroke();
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box(90);
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stroke(255);
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line(-100, 0, 0, 100, 0, 0);
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line(0, -100, 0, 0, 100, 0);
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line(0, 0, -100, 0, 0, 100);
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}

‎content/examples/3D and OpenGL/Camera/Ortho/Ortho.pde‎

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/**
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* Ortho.
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*
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* Move the mouse across the screen to change the parameters
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* for the orthographic projection.
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* The ortho() function sets an orthographic projection and
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* defines a parallel clipping volume. All objects with the
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* same dimension appear the same size, regardless of whether
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* they are near or far from the camera. The parameters to this
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* function specify the clipping volume where left and right
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* are the minimum and maximum x values, top and bottom are the
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* minimum and maximum y values, and near and far are the minimum
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* and maximum z values.
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*
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* Created 28 April 2005
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*/
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void setup()
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{
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size(200, 200, P3D);
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noStroke();
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}
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void draw()
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{
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background(255);
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lights();
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//ortho(0, width, 0, height, -10, 10); // Default ortho settings
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ortho(-width, mouseX, -height/2.0, mouseY/2.0, -10, 10);
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translate(0, 0, -100);
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rotateX(PI/4);
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rotateZ(PI/3);
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pushMatrix();
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for(int i=0; i<width; i+=20) {
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for(int j=0; j<height; j+=20) {
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box(10, 10, (j+i) / 4.0);
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translate(20, 0, 0);
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}
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translate(-200, 20, 0);
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}
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popMatrix();
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}
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‎content/examples/3D and OpenGL/Camera/OrthoVSPerspective/OrthoVSPerspective.pde‎

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/**
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* Ortho vs Perspective.
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*
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* Click to see the difference between orthographic projection
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* and perspective projection as applied to a simple box.
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*
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* Created 28 April 2005
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*/
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void setup()
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{
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size(200, 200, P3D);
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noStroke();
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fill(204);
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}
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void draw()
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{
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background(0);
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lights();
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if(mousePressed) {
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float fov = PI/3.0;
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float cameraZ = (height/2.0) / tan(PI * fov / 360.0);
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perspective(fov, float(width)/float(height),
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cameraZ/2.0, cameraZ*2.0);
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} else {
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ortho(-width/2, width/2, -height/2, height/2, -10, 10);
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}
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translate(100, 100, 0);
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rotateX(-PI/6);
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rotateY(PI/3);
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box(85);
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}
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‎content/examples/3D and OpenGL/Camera/Perspective/Perspective.pde‎

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/**
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* Perspective.
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*
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* Move the mouse left and right to change the field of view (fov).
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* Click to modify the aspect ratio. The perspective() function
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* sets a perspective projection applying foreshortening, making
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* distant objects appear smaller than closer ones. The parameters
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* define a viewing volume with the shape of truncated pyramid.
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* Objects near to the front of the volume appear their actual size,
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* while farther objects appear smaller. This projection simulates
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* the perspective of the world more accurately than orthographic projection.
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* The version of perspective without parameters sets the default
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* perspective and the version with four parameters allows the programmer
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* to set the area precisely.
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*
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* Created 28 April 2005
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*/
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void setup()
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{
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size(200, 200, P3D);
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noStroke();
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}
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void draw()
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{
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lights();
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background(204);
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float cameraY = height/2.0;
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float fov = mouseX/float(width) * PI/2;
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float cameraZ = cameraY / tan(fov / 2.0);
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float aspect = float(width)/float(height);
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if(mousePressed) {
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aspect = aspect / 2.0;
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}
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perspective(fov, aspect, cameraZ/10.0, cameraZ*10.0);
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translate(width/2+30, height/2, 0);
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rotateX(-PI/6);
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rotateY(PI/3 + mouseY/float(height) * PI);
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box(45);
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translate(0, 0, -50);
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box(30);
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}
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‎content/examples/3D and OpenGL/Form/Primitives3D/Primitives3D.pde‎

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/**
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* Primitives 3D.
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*
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* Placing mathematically 3D objects in synthetic space.
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* The lights() method reveals their imagined dimension.
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* The box() and sphere() functions each have one parameter
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* which is used to specify their size. These shapes are
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* positioned using the translate() function.
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*
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* Created 16 January 2003
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*/
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size(200, 200, P3D);
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background(0);
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lights();
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noStroke();
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pushMatrix();
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translate(47, height/2, 0);
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rotateY(0.75);
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box(50);
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popMatrix();
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pushMatrix();
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translate(200, height/2, 0);
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sphere(100);
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popMatrix();
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‎content/examples/3D and OpenGL/Form/RGBCube/RGBCube.pde‎

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/**
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* RGB Cube.
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*
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* The three primary colors of the additive color model are red, green, and blue.
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* This RGB color cube displays smooth transitions between these colors.
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*
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* Created 25 October 2002
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*/
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float xmag, ymag = 0;
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float newXmag, newYmag = 0;
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void setup()
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{
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size(200, 200, P3D);
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noStroke();
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colorMode(RGB, 1);
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}
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void draw()
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{
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background(0.5, 0.5, 0.45);
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pushMatrix();
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translate(width/2, height/2, -30);
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newXmag = mouseX/float(width) * TWO_PI;
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newYmag = mouseY/float(height) * TWO_PI;
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float diff = xmag-newXmag;
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if (abs(diff) > 0.01) { xmag -= diff/4.0; }
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diff = ymag-newYmag;
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if (abs(diff) > 0.01) { ymag -= diff/4.0; }
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rotateX(-ymag);
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rotateY(-xmag);
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scale(50);
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beginShape(QUADS);
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fill(0, 1, 1); vertex(-1, 1, 1);
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fill(1, 1, 1); vertex( 1, 1, 1);
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fill(1, 0, 1); vertex( 1, -1, 1);
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fill(0, 0, 1); vertex(-1, -1, 1);
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fill(1, 1, 1); vertex( 1, 1, 1);
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fill(1, 1, 0); vertex( 1, 1, -1);
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fill(1, 0, 0); vertex( 1, -1, -1);
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fill(1, 0, 1); vertex( 1, -1, 1);
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fill(1, 1, 0); vertex( 1, 1, -1);
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fill(0, 1, 0); vertex(-1, 1, -1);
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fill(0, 0, 0); vertex(-1, -1, -1);
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fill(1, 0, 0); vertex( 1, -1, -1);
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fill(0, 1, 0); vertex(-1, 1, -1);
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fill(0, 1, 1); vertex(-1, 1, 1);
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fill(0, 0, 1); vertex(-1, -1, 1);
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fill(0, 0, 0); vertex(-1, -1, -1);
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fill(0, 1, 0); vertex(-1, 1, -1);
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fill(1, 1, 0); vertex( 1, 1, -1);
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fill(1, 1, 1); vertex( 1, 1, 1);
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fill(0, 1, 1); vertex(-1, 1, 1);
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fill(0, 0, 0); vertex(-1, -1, -1);
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fill(1, 0, 0); vertex( 1, -1, -1);
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fill(1, 0, 1); vertex( 1, -1, 1);
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fill(0, 0, 1); vertex(-1, -1, 1);
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endShape();
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popMatrix();
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}

‎content/examples/3D and OpenGL/Form/Vertices/Vertices.pde‎

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/**
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* Vertices.
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* by Simon Greenwold.
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*
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* Draw a cylinder centered on the y-axis, going down from y=0 to y=height.
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* The radius at the top can be different from the radius at the bottom,
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* and the number of sides drawn is variable.
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*
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* Created 27 May 2007
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*/
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void setup() {
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size(200, 200, P3D);
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}
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void draw() {
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background(0);
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lights();
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translate(width / 2, height / 2);
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rotateY(map(mouseX, 0, width, 0, PI));
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rotateZ(map(mouseY, 0, height, 0, -PI));
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noStroke();
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fill(255, 255, 255);
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translate(0, -40, 0);
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drawCylinder(10, 180, 200, 16); // Draw a mix between a cylinder and a cone
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//drawCylinder(70, 70, 120, 64); // Draw a cylinder
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//drawCylinder(0, 180, 200, 4); // Draw a pyramid
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}
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void drawCylinder(float topRadius, float bottomRadius, float tall, int sides) {
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float angle = 0;
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float angleIncrement = TWO_PI / sides;
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beginShape(QUAD_STRIP);
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for (int i = 0; i < sides + 1; ++i) {
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vertex(topRadius*cos(angle), 0, topRadius*sin(angle));
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vertex(bottomRadius*cos(angle), tall, bottomRadius*sin(angle));
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angle += angleIncrement;
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}
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endShape();
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// If it is not a cone, draw the circular top cap
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if (topRadius != 0) {
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angle = 0;
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beginShape(TRIANGLE_FAN);
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// Center point
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vertex(0, 0, 0);
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for (int i = 0; i < sides + 1; i++) {
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vertex(topRadius * cos(angle), 0, topRadius * sin(angle));
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angle += angleIncrement;
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}
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endShape();
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}
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// If it is not a cone, draw the circular bottom cap
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if (bottomRadius != 0) {
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angle = 0;
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beginShape(TRIANGLE_FAN);
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// Center point
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vertex(0, tall, 0);
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for (int i = 0; i < sides + 1; i++) {
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vertex(bottomRadius * cos(angle), tall, bottomRadius * sin(angle));
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angle += angleIncrement;
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}
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endShape();
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}
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}

‎content/examples/3D and OpenGL/Image/Explode/Explode.pde‎

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/**
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* Explode
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* by <a href="http://www.shiffman.net">Daniel Shiffman</a>.
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*
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* Mouse horizontal location controls breaking apart of image and
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* Maps pixels from a 2D image into 3D space. Pixel brightness controls
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* translation along z axis.
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*
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* Created 2 May 2005
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*/
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PImage img; // The source image
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int cellsize = 2; // Dimensions of each cell in the grid
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int COLS, ROWS; // Number of columns and rows in our system
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void setup()
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{
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size(200, 200, P3D);
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img = loadImage("eames.jpg"); // Load the image
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COLS = width/cellsize; // Calculate # of columns
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ROWS = height/cellsize; // Calculate # of rows
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colorMode(RGB,255,255,255,100); // Setting the colormode
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}
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void draw()
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{
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background(0);
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// Begin loop for columns
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for ( int i = 0; i < COLS;i++) {
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// Begin loop for rows
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for ( int j = 0; j < ROWS;j++) {
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int x = i*cellsize + cellsize/2; // x position
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int y = j*cellsize + cellsize/2; // y position
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int loc = x + y*width; // Pixel array location
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color c = img.pixels[loc]; // Grab the color
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// Calculate a z position as a function of mouseX and pixel brightness
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float z = (mouseX / (float) width) * brightness(img.pixels[loc]) - 100.0f;
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// Translate to the location, set fill and stroke, and draw the rect
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pushMatrix();
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translate(x,y,z);
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fill(c);
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noStroke();
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rectMode(CENTER);
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rect(0,0,cellsize,cellsize);
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popMatrix();
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}
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}
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}

‎content/examples/3D and OpenGL/Image/Explode/data/eames.jpg‎

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‎content/examples/3D and OpenGL/Image/Explode/data/eames.jpg.tmp‎

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