Draw a sphere: Difference between revisions

}</lang>

A sphere build from triangles (to for instance allow distortion)

<lang>float rotX, rotY;

PVector[][] sphere;

int detail = 50;

void setup() {

size(600, 600, P3D);

background(50, 50, 200);

fill(255, 0, 200);

stroke(0, 40);

sphere = new PVector[detail+1][detail+1];

}

void draw() {

pointLight(255, 255, 255, -width, -height, 2*height);

translate(width/2, height/2);

rotateX(rotX);

rotateY(rotY);

float r = 200;

for (int i = 0; i <= detail; i++) {

float rows = map(i, 0, detail, 0, PI);

for (int j = 0; j <= detail; j++) {

float columns = map(j, 0, detail, 0, TWO_PI);

float x = r * sin(rows) * cos(columns);

float y = r * sin(rows) * sin(columns);

float z = r * cos(rows);

sphere[i][j] = new PVector(x, y, z);

}

}

for (int i = 0; i < detail; i++) {

beginShape(TRIANGLE_STRIP);

for (int j = 0; j <= detail; j++) {

PVector v1 = sphere[i][j];

vertex(v1.x, v1.y, v1.z);

PVector v2 = sphere[i+1][j];

vertex(v2.x, v2.y, v2.z);

}

endShape();

}

}

void mouseDragged() {

rotY -= (mouseX - pmouseX) * 0.01;

rotX -= (mouseY - pmouseY) * 0.01;