Hello people, I bring you a code that I have not yet seen in the processing forum, it is a great help to make video scrolling games or a huge help to make cyclic textures effects completely adaptable to all the needs you may have.
Let’s enjoy it 
CODE:
/*
[This code is part of gameLibZero for Processing 3.x.x]
17/04/2019 - By Luis lopez martinez..
+ This code shows how it makes a complex scroll parallax layer..
+ This code is free for all use, enjoy it.
*/
int st = 0;
scroll id;
//--------------------------------------------------------------------
void setup(){
size(1280, 720, P2D);
frameRate = 60;
}
//--------------------------------------------------------------------
void draw(){
background(0);
switch(st){
case 0:
id = new scroll(loadImage("background.png"));
id.x = 640;
id.y = 360;
id.sizeX = 20;
id.sizeY = 20;
st = 10;
break;
case 10:
// draw texts on screen..
// screenDrawText( textFont, textSize, text, centerCode, x, y, color, opacity 0..255<-(byte notation) );
screenDrawText(null, 18, "KEYS TO WORK WITH THIS OBJECT", CENTER, 640, 15, 255, 255);
screenDrawText(null, 16, "W A S D -> Tiling control", RIGHT, 30, 40, 255, 255);
screenDrawText(null, 16, "I K O L -> Size axis control", RIGHT, 30, 60, 255, 255);
screenDrawText(null, 16, "UP DOWN LEFT RIGHT -> Texture offset control", RIGHT, 300, 40, color(255, 64, 64), 255);
screenDrawText(null, 16, "M + [UP DOWN LEFT RIGHT] -> Texture position control", RIGHT, 300, 60, color(64, 64, 255), 255);
screenDrawText(null, 16, "U J -> XMIRROR YMIRROR control", RIGHT, 750, 40, 255, 255);
screenDrawText(null, 16, "E R -> Texture rotation control", RIGHT, 750, 60, 255, 255);
screenDrawText(null, 16, "SPACE -> RESET MATRIX", CENTER, 640, 100, RED, 255);
screenDrawText(null, 16, "PShape scroll controller - Luis lopez martinez - Barcelona - SPAIN - 2019.", CENTER, 640, 700, YELLOW, 255);
// reset effects..
if(key(_SPACE)){
id.tiling.x = 1;
id.tiling.y = 1;
id.offset.x = 0;
id.offset.y = 0;
id.angle = 0;
id.sizeX = 20;
id.sizeY = 20;
id.x = 640;
id.y = 360;
}
// tiling control..
if(key(_A)){
id.tiling.x -= 0.1;
}
if(key(_D)){
id.tiling.x += 0.1;
}
if(key(_W)){
id.tiling.y -= 0.1;
}
if(key(_S)){
id.tiling.y += 0.1;
}
// pshape size with separated axis..
if(key(_I)){
id.sizeX++;
}
if(key(_K)){
id.sizeX--;
}
if(key(_O)){
id.sizeY++;
}
if(key(_L)){
id.sizeY--;
}
// texture mirrorin control with separated axis..
if(key(_U)){
id.xmirror = true;
}else{
id.xmirror = false;
}
if(key(_J)){
id.ymirror = true;
}else{
id.ymirror = false;
}
if(key(_M)){
// texture offset control..
if(key(_LEFT)){
id.x -= 10;
}
if(key(_RIGHT)){
id.x += 10;
}
if(key(_UP)){
id.y -= 10;
}
if(key(_DOWN)){
id.y += 10;
}
}else{
// texture offset control..
if(key(_LEFT)){
id.offset.x -= 10;
}
if(key(_RIGHT)){
id.offset.x += 10;
}
if(key(_UP)){
id.offset.y -= 10;
}
if(key(_DOWN)){
id.offset.y += 10;
}
}
// rotation control..
if(key(_E)){
id.angle++;
}
if(key(_R)){
id.angle--;
}
// draw shape with all FX..
id.render();
break;
}
}
//--------------------------------------------------------------------
//--------------------------------------------------------------------
//--------------------------------------------------------------------
class scroll {
int st = 0;
PImage gr;
PShape s = null;
float size = 100;
float sizeX = 100;
float sizeY = 100;
float x = 0;
float y = 0;
float angle = 0;
PVector offset = new PVector(0, 0);
PVector tiling = new PVector(1, 1);
boolean xmirror = false;
boolean ymirror = false;
//......................................
scroll(PImage gr) {
this.gr = gr;
}
//......................................
void render() {
// configure transformation matrix..
shapeMode(CENTER);
textureWrap(REPEAT);
// create a pshape..
s = createShape();
s.setTexture(gr);
s.disableStyle();
s.beginShape();
s.vertex(0, 0, offset.x*tiling.x, offset.y*tiling.y);
s.vertex(gr.width, 0, (gr.width+offset.x)*tiling.x, 0+(offset.y)*tiling.y);
s.vertex(gr.width, gr.height, (gr.width+offset.x)*tiling.x, (gr.height+offset.y)*tiling.y);
s.vertex(0, gr.height, offset.x*tiling.x, (gr.height+offset.y)*tiling.y);
s.endShape(CLOSE);
// apply pshape fx translate, rotate and scale..
translate(x, y);
rotate(radians(-angle));
if(size==100){
scale( xmirror ? -sizeX/100.0 : sizeX/100.0, ymirror ? -sizeY/100.0 : sizeY/100.0);
}else{
scale( xmirror ? -size/100.0 : size/100.0, ymirror ? -size/100.0 : size/100.0);
}
shape(s);
}
//......................................
//......................................
//......................................
}
//--------------------------------------------------------------------
//--------------------------------------------------------------------
//--------------------------------------------------------------------
// multi-key controller..
// -------------------------------------
final int _UP = 38;
final int _DOWN = 40;
final int _LEFT = 37;
final int _RIGHT = 39;
final int _SPACE = 32;
final int _ESC = 27;
final int _ENTER = 10;
final int _F1 = 112;
final int _F2 = 113;
final int _F3 = 114;
final int _F4 = 115;
final int _F5 = 116;
final int _F6 = 117;
final int _F7 = 118;
final int _F8 = 119;
final int _F9 = 120;
final int _F10 = 121;
final int _PRINT = 154;
final int _BLOQ = 145;
final int _PAUSE = 19;
final int _PLUS = 139;
final int _MINUS = 140;
final int _DEL = 147;
final int _A = 65;
final int _B = 66;
final int _C = 67;
final int _D = 68;
final int _E = 69;
final int _F = 70;
final int _G = 71;
final int _H = 72;
final int _I = 73;
final int _J = 74;
final int _K = 75;
final int _L = 76;
final int _M = 77;
final int _N = 78;
final int _O = 79;
final int _P = 80;
final int _Q = 81;
final int _R = 82;
final int _S = 83;
final int _T = 84;
final int _U = 85;
final int _V = 86;
final int _W = 87;
final int _X = 88;
final int _Y = 89;
final int _Z = 90;
boolean[] keys = new boolean[256];
//.............................................................................................................................................................
void keyPressed() {
keys[keyCode] = true;
}
//.............................................................................................................................................................
void keyReleased() {
keys[keyCode] = false;
}
//.............................................................................................................................................................
final boolean key(int code) {
return keys[code];
}
//.............................................................................................................................................................
//--------------------------------------------------------------------
//--------------------------------------------------------------------
//--------------------------------------------------------------------
// simple text controller..
final void screenDrawText(PFont fnt_, int size, String text, int cod, float x, float y, color col, float alpha) {
pushMatrix();
if (fnt_ != null) {
textFont(fnt_);
}
textSize(size);
if (cod==CENTER) {
textAlign(CENTER, CENTER);
}
if (cod==RIGHT) {
textAlign(LEFT, CENTER);
}
if (cod==LEFT) {
textAlign(RIGHT, CENTER);
}
fill(col, alpha);
text(text, x, y);
popMatrix();
}
//--------------------------------------------------------------------
// simple color collection..
color LIGHTGRAY = color( 200, 200, 200, 255 ); // Light Gray
color GRAY = color( 130, 130, 130, 255 ); // Gray
color DARKGRAY = color( 80, 80, 80, 255 ); // Dark Gray
color YELLOW = color( 253, 249, 0, 255 ); // Yellow
color GOLD = color( 255, 203, 0, 255 ); // Gold
color ORANGE = color( 255, 161, 0, 255 ); // Orange
color PINK = color( 255, 109, 194, 255 ); // Pink
color RED = color( 230, 41, 55, 255 ); // Red
color MAROON = color( 190, 33, 55, 255 ); // Maroon
color GREEN = color( 0, 228, 48, 255 ); // Green
color LIME = color( 0, 158, 47, 255 ); // Lime
color DARKGREEN = color( 0, 117, 44, 255 ); // Dark Green
color SKYBLUE = color( 102, 191, 255, 255 ); // Sky Blue
color BLUE = color( 0, 121, 241, 255 ); // Blue
color DARKBLUE = color( 0, 82, 172, 255 ); // Dark Blue
color PURPLE = color( 200, 122, 255, 255 ); // Purple
color VIOLET = color( 135, 60, 190, 255 ); // Violet
color DARKPURPLE= color( 112, 31, 126, 255 ); // Dark Purple
color BEIGE = color( 211, 176, 131, 255 ); // Beige
color BROWN = color( 127, 106, 79, 255 ); // Brown
color DARKBROWN = color( 76, 63, 47, 255 ); // Dark Brown
color WHITE = color( 255, 255, 255, 255 ); // White
color BLACK = color( 0, 0, 0, 255 ); // Black
color BLANK = color( 0, 0, 0, 0 ); // Transparent
color MAGENTA = color( 255, 0, 255, 255 ); // Magenta
color RAYWHITE = color( 245, 245, 245, 255 ); // Ray White
If you liked it, please comment!
