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‎contribution.txt‎

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name=C++ Mode
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category=Other
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authors=[Jose Llamas](https://github.com/pepc84)
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url=https://github.com/processing-cpp/processing.cpp
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sentence=Write Processing sketches in C++, compiled to a native binary.
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paragraph=C++ Mode lets you write sketches using the familiar Processing API — size(), ellipse(), mouseX, draw() — but compiled to a native binary via g++. Runs on Linux, macOS, and Windows (via MSYS2). Requires g++ and OpenGL (GLFW + GLEW).
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version=1
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prettyVersion=0.1.0
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minRevision=1275
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maxRevision=0
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type=Mode
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download=https://github.com/processing-cpp/processing.cpp/releases/download/v0.1.0/cppMode.zip

‎examples/Basics/arrays/Array.pde‎

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/**
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* Array.
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*
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* An array is a list of data. Each piece of data in an array
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* is identified by an index number representing its position in
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* the array. Arrays are zero based, which means that the first
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* element in the array is [0], the second element is [1], and so on.
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* In this example, an array named "coswave" is created and
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* filled with the cosine values. This data is displayed three
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* separate ways on the screen.
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*/
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float* coswave;
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void setup() {
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size(640, 360);
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coswave = new float[width];
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for (int i = 0; i < width; i++) {
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float amount = map(i, 0, width, 0, PI);
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coswave[i] = abs(cos(amount));
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}
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background(255);
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noLoop();
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}
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void draw() {
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int y1 = 0;
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int y2 = height / 3;
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for (int i = 0; i < width; i++) {
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stroke(coswave[i] * 255);
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line(i, y1, i, y2);
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}
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y1 = y2;
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y2 = y1 + y1;
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for (int i = 0; i < width; i++) {
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stroke(coswave[i] * 255 / 4);
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line(i, y1, i, y2);
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}
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y1 = y2;
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y2 = height;
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for (int i = 0; i < width; i++) {
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stroke(255 - coswave[i] * 255);
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line(i, y1, i, y2);
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}
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}

‎examples/Basics/arrays/Array/Array.pde‎

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/**
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* Array.
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*
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* An array is a list of data. Each piece of data in an array
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* is identified by an index number representing its position in
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* the array. Arrays are zero based, which means that the first
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* element in the array is [0], the second element is [1], and so on.
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* In this example, an array named "coswave" is created and
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* filled with the cosine values. This data is displayed three
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* separate ways on the screen.
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*/
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float* coswave;
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void setup() {
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size(640, 360);
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coswave = new float[width];
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for (int i = 0; i < width; i++) {
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float amount = map(i, 0, width, 0, PI);
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coswave[i] = abs(cos(amount));
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}
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background(255);
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noLoop();
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}
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void draw() {
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int y1 = 0;
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int y2 = height / 3;
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for (int i = 0; i < width; i++) {
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stroke(coswave[i] * 255);
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line(i, y1, i, y2);
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}
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y1 = y2;
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y2 = y1 + y1;
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for (int i = 0; i < width; i++) {
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stroke(coswave[i] * 255 / 4);
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line(i, y1, i, y2);
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}
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y1 = y2;
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y2 = height;
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for (int i = 0; i < width; i++) {
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stroke(255 - coswave[i] * 255);
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line(i, y1, i, y2);
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}
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}

‎examples/Basics/arrays/Array_2D/Array_2D.pde‎

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/**
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* Array 2D.
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*
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* Demonstrates the syntax for creating a two-dimensional (2D) array.
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* Values in a 2D array are accessed through two index values.
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* 2D arrays are useful for storing images. In this example, each dot
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* is colored in relation to its distance from the center of the image.
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*/
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float* distances;
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float maxDistance;
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int spacer;
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void setup() {
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size(640, 360);
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maxDistance = dist(width/2, height/2, width, height);
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distances = new float[width * height];
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for (int y = 0; y < height; y++) {
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for (int x = 0; x < width; x++) {
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float distance = dist(width/2, height/2, x, y);
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distances[x + y * width] = distance / maxDistance * 255;
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}
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}
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spacer = 10;
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strokeWeight(6);
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noLoop();
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}
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void draw() {
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background(0);
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for (int y = 0; y < height; y += spacer) {
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for (int x = 0; x < width; x += spacer) {
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stroke(distances[x + y * width]);
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point(x + spacer/2, y + spacer/2);
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}
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}
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}

‎examples/Basics/arrays/Array_Objects/Array_Objects.pde‎

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/**
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* Array Objects.
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*
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* Demonstrates the syntax for creating an array of custom objects.
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*/
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struct Module {
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int xOffset, yOffset;
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float x, y;
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int unit;
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int xDirection, yDirection;
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float speed;
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Module() : xOffset(0),yOffset(0),x(0),y(0),unit(0),xDirection(1),yDirection(1),speed(0) {}
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Module(int xOffsetTemp, int yOffsetTemp, int xTemp, int yTemp, float speedTemp, int tempUnit)
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: xOffset(xOffsetTemp), yOffset(yOffsetTemp), x(xTemp), y(yTemp),
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unit(tempUnit), xDirection(1), yDirection(1), speed(speedTemp) {}
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void update() {
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x += speed * xDirection;
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if (x >= unit || x <= 0) {
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xDirection *= -1;
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x += 1 * xDirection;
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y += 1 * yDirection;
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}
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if (y >= unit || y <= 0) {
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yDirection *= -1;
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y += 1 * yDirection;
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}
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}
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void display() {
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fill(255);
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ellipse(xOffset + x, yOffset + y, 6, 6);
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}
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};
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int unit = 40;
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int count;
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Module* mods;
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void setup() {
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size(640, 360);
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noStroke();
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int wideCount = width / unit;
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int highCount = height / unit;
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count = wideCount * highCount;
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mods = new Module[count];
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int index = 0;
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for (int y = 0; y < highCount; y++) {
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for (int x = 0; x < wideCount; x++) {
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mods[index++] = Module(x*unit, y*unit, unit/2, unit/2, random(0.05f, 0.8f), unit);
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}
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}
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}
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void draw() {
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background(0);
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for (int i = 0; i < count; i++) {
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mods[i].update();
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mods[i].display();
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}
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}

‎examples/Basics/arrays/sketch.properties‎

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main=Array.pde
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mode=C++
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mode.id=processing.mode.cpp.CppMode

‎examples/Basics/camera/Move_Eye/Move_Eye.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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void setup() {
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size(640, 360, 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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}

‎examples/Basics/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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void setup() {
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size(640, 360, P3D);
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noStroke();
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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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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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}

‎examples/Basics/camera/Perspective_vs_Ortho/Perspective_vs_Ortho.pde‎

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/**
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* Perspective vs. Ortho
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*
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* Move the mouse left to right to change the "far"
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* parameter for the perspective() and ortho() functions.
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* This parameter sets the maximum distance from the
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* origin away from the viewer and will clip the geometry.
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* Click a mouse button to switch between the perspective and
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* orthographic projections.
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*/
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bool showPerspective = false;
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void setup() {
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size(600, 360, P3D);
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noFill();
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fill(255);
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noStroke();
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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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float far = map(mouseX, 0, width, 120, 400);
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if (showPerspective == true) {
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perspective(PI/3.0, float(width)/float(height), 10, far);
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} else {
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ortho(-width/2.0, width/2.0, -height/2.0, height/2.0, 10, far);
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}
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translate(width/2, height/2, 0);
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rotateX(-PI/6);
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rotateY(PI/3);
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box(180);
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}
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void mousePressed() {
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showPerspective = !showPerspective;
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}
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‎examples/Basics/color/Brightness/Brightness.pde‎

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int barWidth = 20;
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int lastBar = -1;
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void setup() {
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size(640, 360);
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colorMode(HSB, width, 100, height);
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noStroke();
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background(0);
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}
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void draw() {
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int whichBar = mouseX / barWidth;
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if (whichBar != lastBar) {
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int barX = whichBar * barWidth;
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fill(barX, 100, mouseY);
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rect(barX, 0, barWidth, height);
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lastBar = whichBar;
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}
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}

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