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Processing and Laser cutting
This example produces a pseudo 3d form from a depth map image. It produces a pdf file suitable for Laser cutting based on this slicing method.
import processing.pdf.*;
PGraphicsPDF pdf;
int gridWidth = 100;
int gridHeight = 100;
int cutHeight = 50;
float pointDistX = 5;
float pointDistY = 5;
ArrayList<Float> imageGreyScaleList = new ArrayList<Float>();
ArrayList<Integer> MaxHeight = new ArrayList<Integer>();
float waveHeight = 20;
PImage baseImage;
void setup() {
size(700, 700);
smooth();
baseImage = loadImage("data/image.jpg");
baseImage.loadPixels();
int loc;
float combinedHeight = 0;
for (int i = 0; i < baseImage.width; i++) {
MaxHeight.add(0);
for (int j = 0; j < baseImage.height; j++) {
loc = i + j*baseImage.width;
//println(baseImage.pixels[loc]);
color pixel = baseImage.pixels[loc];
int greyScale = floor(red(pixel));
float heightConverted = map(greyScale, 0, 255, 0, -waveHeight);
imageGreyScaleList.add(heightConverted);
}
combinedHeight += waveHeight+cutHeight;
}
// create a pdf the lenght of the total graphic
pdf = (PGraphicsPDF) createGraphics(width, int(combinedHeight), PDF, "export.pdf");
}
void draw() {
background(255);
beginRecord(pdf);
exportSlices();
endRecord();
background(255);
draw2D();
noLoop();
};
void draw2D() {
fill(255);
background(255);
pushMatrix();
//translate graphic to the center of the screen
translate((width-(pointDistX*gridWidth))/2, (height-(pointDistY*gridHeight))/2);
int loc;
for (int i = 0; i<gridHeight; i++ ) {
beginShape();
for (int j = 0; j<gridWidth; j++) {
loc = i + j*baseImage.width;
float posX = j*pointDistX;
float posY = i*pointDistY+imageGreyScaleList.get(loc); // offset y coordinate based on the pixels colour
curveVertex(posX, posY);
};
endShape();
};
popMatrix();
};
void exportSlices() {
noFill();
background(255);
pushMatrix();
//translate graphic to the center of the screen
//translate((width-(pointDistX*gridWidth))/2, (height-(pointDistY*gridHeight))/2);
int loc;
for (int i = 0; i<gridHeight; i++ ) {
float y = i*(pointDistY+cutHeight+waveHeight);
beginShape();
curveVertex(0, y);
for (int j = 0; j<gridWidth; j++) {
loc = i + j*baseImage.width;
float posX = j*pointDistX;
float posY = y+imageGreyScaleList.get(loc); // offset y coordinate based on the pixels colour
curveVertex(posX, posY);
};
vertex(gridWidth*pointDistX, y);
vertex(gridWidth*pointDistX, y+cutHeight);
vertex(0, y+cutHeight);
vertex(0, y);
pushStyle();
fill(0);
text("no_ "+i, 5, y+cutHeight-5);
popStyle();
endShape();
};
popMatrix();
};
