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Looking for help with a second pivot point (i.e. the elbow joint in an arm)

[11 Replies]
- 14-Aug-2013 01:08 PM
- Forum: Programming Questions
I do not know if anyone can help me but I did notice from my Google research that quite a few questions are successfully answered here. I have this robot I am working on and since I am completely new to Processing and programming in general, I decided I would try something completely new and work with an SVG file. I have the robot moving but his elbow pivot will not work properly. I originally created him with Geomerative but when I realized I wanted to put him online I moved him to PShapes. I do not know if you can even see him since he is made of pieces (SVG files) but here is the code I am using:

PShape LArm;

PShape LUpper;

PShape LLower;

PShape RArm;

PShape Body;

PShape Head;

PShape LLeg;

PShape RLeg;

int radius;

int radius2;

void setup() {

size (500, 500);

LArm= loadShape("LArm.svg");

LUpper= LArm.getChild(0);

LLower= LArm.getChild(1);

RArm= loadShape("RArm.svg");

Body= loadShape("body.svg");

Head= loadShape("head.svg");

RLeg= loadShape("RLeg.svg");

LLeg= loadShape("RLeg.svg");

}

void draw() {

background(255);

smooth();

translate(width/2, height/2);

/*translate(mouseX,mouseY);*/

noStroke();

{ //Body

pushMatrix();

translate(0, 91);

shape(Body, 0, 0);

popMatrix();

}

{ //Head

pushMatrix();

translate(0, -30);

shape(Head, 0, 0);

popMatrix();

}

{ //Left Arm

pushMatrix();

translate(-50, -10);

rotate(radians(100*float(mouseX)/width));

shape(LUpper, 0, 0);

popMatrix();

}

{

pushMatrix();

radius = (int) sqrt(sq(41) + sq(66));

radius2 = (int) sqrt(sq(37) + sq(60));

translate(-120 + radius*cos(radians(100*float(mouseX)/width)), -10 + radius*sin(radians(100*float(mouseX)/width)));

/* translate(-120+radius*cos(radians(100*float(mouseX)/width))+radius2*cos(radians(100*float(mouseX)/width+180*float(mouseX)/width)),

-10+radius*sin(radians(100*float(mouseX)/width)) + radius2*sin(radians(100*float(mouseX)/width+180*float(mouseX)/width)));*/

rotate(radians(180*float(mouseX)/width));

shape(LLower, 0, 0);

popMatrix();

}

{//Right Arm

pushMatrix();

translate(50, -10);

rotate(radians(-100*float(mouseX)/width));

shape(RArm, 0, 0);

popMatrix();

}

{ //Left Leg

pushMatrix();

scale(-1, 1);

translate(20, 90);

rotate(radians(-100*float(mouseX)/width));

shape(LLeg, 0, 0);

popMatrix();

}

{ //Right Leg

pushMatrix();

translate(30, 90);

rotate(radians(-100*float(mouseX)/width));

shape(RLeg, 0, 0);

popMatrix();

}

}

Again, since this is my first programming class, it could something as small as not capitalizing something but I am pretty sure it is my Maths. I have been working on it for about three weeks now and I finally decided it was time to get help outside of my class and friends. I hope you will still be able to see his issues even without his SVG files as I have no idea how to post them here....

Thank you all in advance for any help you can offer!!

**Jetty

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