a port of the Processing Visualization Language

TriangleStrip

By Ira Greenberg Generate a closed ring using vertex() function and beginShape(TRIANGLE_STRIP) mode. outerRad and innerRad variables control ring's outer/inner radii respectively. Trig functions generate ring.

Original Processing.org Example: TriangleStrip

// All Examples Written by Casey Reas and Ben Fry

// unless otherwise stated.

size(200, 200);

background(204);

smooth();



int x = width/2;

int y = height/2;

int outerRad = 80;

int innerRad = 50;

float px = 0, py = 0, angle = 0;

float pts = 36;

float rot = 360.0/pts;



beginShape(TRIANGLE_STRIP); 

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

  px = x+cos(radians(angle))*outerRad;

  py = y+sin(radians(angle))*outerRad;

  angle+=rot;

  vertex(px, py);

  px = x+cos(radians(angle))*innerRad;

  py = y+sin(radians(angle))*innerRad;

  vertex(px, py); 

  angle+=rot;

}

endShape();
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