Alvaro Cassinelli / Mbed 2 deprecated skinGames_II

save loops

Dependencies:   mbed

classSpring.cpp@1:3be7b7d050f4, 2014-12-02 (annotated)

Committer:
mbedalvaro
Date:
Tue Dec 02 08:29:59 2014 +0000
Revision:
1:3be7b7d050f4
Parent:
0:df6fdd9b99f0 
updated

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbedalvaro 0:df6fdd9b99f0 1 #include "classSpring.h"
mbedalvaro 0:df6fdd9b99f0 2 #include "myVectorClass.h"
mbedalvaro 0:df6fdd9b99f0 3
mbedalvaro 0:df6fdd9b99f0 4 //---------------------------------------------------------------------
mbedalvaro 0:df6fdd9b99f0 5 spring::spring(){
mbedalvaro 0:df6fdd9b99f0 6 massA = NULL;
mbedalvaro 0:df6fdd9b99f0 7 massB = NULL;
mbedalvaro 0:df6fdd9b99f0 8 }
mbedalvaro 0:df6fdd9b99f0 9
mbedalvaro 0:df6fdd9b99f0 10 //---------------------------------------------------------------------
mbedalvaro 0:df6fdd9b99f0 11 void spring::update(){
mbedalvaro 0:df6fdd9b99f0 12 if ((massA == NULL) || (massB == NULL)){
mbedalvaro 0:df6fdd9b99f0 13 return;
mbedalvaro 0:df6fdd9b99f0 14 }
mbedalvaro 0:df6fdd9b99f0 15
mbedalvaro 0:df6fdd9b99f0 16 vector2Df pta = massA->pos;
mbedalvaro 0:df6fdd9b99f0 17 vector2Df ptb = massB->pos;
mbedalvaro 0:df6fdd9b99f0 18
mbedalvaro 0:df6fdd9b99f0 19 float theirDistance = (pta - ptb).length();
mbedalvaro 0:df6fdd9b99f0 20 float springForce = (springiness * (distance - theirDistance));
mbedalvaro 0:df6fdd9b99f0 21 vector2Df frcToAdd = (pta-ptb).normalize() * springForce;
mbedalvaro 0:df6fdd9b99f0 22
mbedalvaro 0:df6fdd9b99f0 23 massA->addForce(frcToAdd);
mbedalvaro 0:df6fdd9b99f0 24 massB->addForce(-frcToAdd);
mbedalvaro 0:df6fdd9b99f0 25 //massA->totalForce.x+=frcToAdd.x;massA->totalForce.y+=frcToAdd.y;
mbedalvaro 0:df6fdd9b99f0 26 //massB->totalForce.x-=frcToAdd.x;massB->totalForce.y-=frcToAdd.y;
mbedalvaro 0:df6fdd9b99f0 27 }
mbedalvaro 0:df6fdd9b99f0 28
mbedalvaro 0:df6fdd9b99f0 29 void spring::assymetricUpdate(){ // only second mass suffers a force
mbedalvaro 0:df6fdd9b99f0 30 if ((massA == NULL) || (massB == NULL)){
mbedalvaro 0:df6fdd9b99f0 31 return;
mbedalvaro 0:df6fdd9b99f0 32 }
mbedalvaro 0:df6fdd9b99f0 33
mbedalvaro 0:df6fdd9b99f0 34 vector2Df pta = massA->pos;
mbedalvaro 0:df6fdd9b99f0 35 vector2Df ptb = massB->pos;
mbedalvaro 0:df6fdd9b99f0 36
mbedalvaro 0:df6fdd9b99f0 37 float theirDistance = (pta - ptb).length();
mbedalvaro 0:df6fdd9b99f0 38 float springForce = (springiness * (distance - theirDistance));
mbedalvaro 0:df6fdd9b99f0 39 vector2Df frcToAdd = (pta-ptb).normalize() * springForce;
mbedalvaro 0:df6fdd9b99f0 40
mbedalvaro 0:df6fdd9b99f0 41 //massA->addForce(frcToAdd);
mbedalvaro 0:df6fdd9b99f0 42 massB->addForce(-frcToAdd);
mbedalvaro 0:df6fdd9b99f0 43 //massA->totalForce.x+=frcToAdd.x;massA->totalForce.y+=frcToAdd.y;
mbedalvaro 0:df6fdd9b99f0 44 //massB->totalForce.x-=frcToAdd.x;massB->totalForce.y-=frcToAdd.y;
mbedalvaro 0:df6fdd9b99f0 45 }