Examples mods and 1 removed

This commit is contained in:
REAS
2013-07-23 15:30:36 -07:00
parent c7d9a4ecb7
commit 9a7dc075bc
3 changed files with 15 additions and 118 deletions

View File

@@ -1,102 +0,0 @@
/**
* Bezier Ellipse
* By Ira Greenberg
*
* Generates an ellipse using bezier() and
* trig functions. Approximately every 1/2
* second a new ellipse is plotted using
* random values for control/anchor points.
*/
// arrays to hold ellipse coordinate data
float[] px, py, cx, cy, cx2, cy2;
// global variable-points in ellipse
int pts = 4;
color controlPtCol = #222222;
color anchorPtCol = #BBBBBB;
void setup(){
size(640, 360);
setEllipse(pts, 65, 65);
frameRate(1);
}
void draw(){
background(145);
drawEllipse();
setEllipse(int(random(3, 12)), random(-100, 150), random(-100, 150));
}
// Draw ellipse with anchor/control points
void drawEllipse(){
strokeWeight(1.125);
stroke(255);
noFill();
// Create ellipse
for (int i=0; i<pts; i++){
if (i==pts-1) {
bezier(px[i], py[i], cx[i], cy[i], cx2[i], cy2[i], px[0], py[0]);
}
else{
bezier(px[i], py[i], cx[i], cy[i], cx2[i], cy2[i], px[i+1], py[i+1]);
}
}
strokeWeight(.75);
stroke(0);
rectMode(CENTER);
// Control handles and tangent lines
for ( int i = 0; i < pts; i++){
if (i==pts-1){ // Last loop iteration-close path
line(px[0], py[0], cx2[i], cy2[i]);
}
if (i>0){
line(px[i], py[i], cx2[i-1], cy2[i-1]);
}
line(px[i], py[i], cx[i], cy[i]);
}
for ( int i=0; i< pts; i++){
fill(controlPtCol);
noStroke();
// Control handles
ellipse(cx[i], cy[i], 4, 4);
ellipse(cx2[i], cy2[i], 4, 4);
fill(anchorPtCol);
stroke(0);
// Anchor points
rect(px[i], py[i], 5, 5);
}
}
// Fill arrays with ellipse coordinate data
void setEllipse(int points, float radius, float controlRadius){
pts = points;
px = new float[points];
py = new float[points];
cx = new float[points];
cy = new float[points];
cx2 = new float[points];
cy2 = new float[points];
float angle = 360.0/points;
float controlAngle1 = angle/3.0;
float controlAngle2 = controlAngle1*2.0;
for ( int i=0; i<points; i++){
px[i] = width/2+cos(radians(angle))*radius;
py[i] = height/2+sin(radians(angle))*radius;
cx[i] = width/2+cos(radians(angle+controlAngle1))*
controlRadius/cos(radians(controlAngle1));
cy[i] = height/2+sin(radians(angle+controlAngle1))*
controlRadius/cos(radians(controlAngle1));
cx2[i] = width/2+cos(radians(angle+controlAngle2))*
controlRadius/cos(radians(controlAngle1));
cy2[i] = height/2+sin(radians(angle+controlAngle2))*
controlRadius/cos(radians(controlAngle1));
// Increment angle so trig functions keep chugging along
angle+=360.0/points;
}
}

View File

@@ -13,6 +13,7 @@ int p3 = p2+d;
int p4 = p3+d;
size(640, 360);
noSmooth();
background(0);
translate(140, 0);

View File

@@ -1,43 +1,41 @@
/**
* TRIANGLE_STRIP Mode
* Triangle Strip
* by Ira Greenberg.
*
* Generate a closed ring using the vertex() function and
* beginShape(TRIANGLE_STRIP) mode. The outerRad and innerRad
* beginShape(TRIANGLE_STRIP) mode. The outsideRadius and insideRadius
* variables control ring's radii respectively.
*/
int x;
int y;
float outerRad;
float innerRad;
float outsideRadius = 150;
float insideRadius = 100;
void setup() {
size(640, 360);
background(204);
x = width/2;
y = height/2;
outerRad = min(width, height) * 0.4;
innerRad = outerRad * 0.6;
}
void draw() {
background(204);
int pts = int(map(mouseX, 0, width, 6, 60));
float rot = 180.0/pts;
int numPoints = int(map(mouseX, 0, width, 6, 60));
float angle = 0;
float angleStep = 180.0/numPoints;
beginShape(TRIANGLE_STRIP);
for (int i = 0; i <= pts; i++) {
float px = x + cos(radians(angle)) * outerRad;
float py = y + sin(radians(angle)) * outerRad;
angle += rot;
for (int i = 0; i <= numPoints; i++) {
float px = x + cos(radians(angle)) * outsideRadius;
float py = y + sin(radians(angle)) * outsideRadius;
angle += angleStep;
vertex(px, py);
px = x + cos(radians(angle)) * innerRad;
py = y + sin(radians(angle)) * innerRad;
px = x + cos(radians(angle)) * insideRadius;
py = y + sin(radians(angle)) * insideRadius;
vertex(px, py);
angle += rot;
angle += angleStep;
}
endShape();
}