rt300@0: //
rt300@0: //  globalForces.cpp
rt300@0: //  wablet
rt300@0: //
rt300@0: //  Created by Robert Tubb on 18/07/2011.
rt300@0: //  Copyright 2011 __MyCompanyName__. All rights reserved.
rt300@0: //
rt300@0: 
rt300@0: #include "globalForces.h"
rt300@0: 
rt300@0: 
rt300@0: //-----------------------------------------------------------
rt300@0: GlobalForces::GlobalForces(): grav(0.0,0.0){
rt300@0:     //construct
rt300@0:     gravityOn = true;
rt300@0:     
rt300@0:     speedLimit = 100.0;
rt300@0:     wallBounce = 0.5;
rt300@0:     
rt300@0:     pressureAmt = 0.0;
rt300@0:     gravityAmt = 0.2;
rt300@0:     touchStrength = 1.0;
rt300@0:     homingAmt = 0.0;
rt300@0:     avFilterAmt = 0.0;
rt300@0:     
rt300@0:     pressure = 0.0;
rt300@14:     volume = 6.0;
rt300@0:     
rt300@0:     maxForcePoints = 11;
rt300@0:     excitationType = POSITION;
rt300@12:     excitationShape = SINE;
rt300@12:     excitationStrength = 2;
rt300@0:     
rt300@12:     exciteShapeX = 2;
rt300@12:     exciteShapeY = 3;
rt300@0:     forceTouchPoints = new forceTouchPoint[maxForcePoints];
rt300@0:     for(int i = 0; i< 11; i++){
rt300@0:         forceTouchPoints[i].x = 0.0;
rt300@0:         forceTouchPoints[i].y = 0.0;
rt300@0:         forceTouchPoints[i].tid = -1;
rt300@0:         
rt300@0:     }
rt300@0:     
rt300@0:     
rt300@0: }
rt300@0: 
rt300@0: //-----------------------------------------------------------
rt300@0: GlobalForces::~GlobalForces(){
rt300@0:     //destruct
rt300@0:     
rt300@0: }
rt300@0: void GlobalForces::update(){
rt300@0:     // gravity 
rt300@0:     grav.setCoord(ofxAccelerometer.getForce().y * 0.015 * gravityAmt, ofxAccelerometer.getForce().x * 0.015 * gravityAmt);
rt300@0:     // time step
rt300@0:     delt = 1/ofGetFrameRate();
rt300@0:     
rt300@0: }
rt300@0: //-----------------------------------------------------------
rt300@0: // this is actually only called from dropletmesh.update
rt300@0: void GlobalForces::setPressure(double aP){
rt300@0:     
rt300@0:     pressure = pressureAmt*aP;
rt300@0: }
rt300@0: //-----------------------------------------------------------
rt300@0: void GlobalForces::createForceTouchPoint(double ax,double ay, int touchId){
rt300@0: 
rt300@0:     forceTouchPoints[touchId].x = ax;
rt300@0:     forceTouchPoints[touchId].y = ay;
rt300@0:     forceTouchPoints[touchId].tid = touchId; 
rt300@0: 
rt300@0:     
rt300@0:     
rt300@0: }
rt300@0: //-----------------------------------------------------------
rt300@0: void GlobalForces::moveForceTouchPoint(double ax,double ay, int touchId){
rt300@0:     //
rt300@0:     for(int i = 0;i<maxForcePoints; i++){
rt300@0:         if(forceTouchPoints[touchId].tid == touchId){
rt300@0:             forceTouchPoints[touchId].x = ax;
rt300@0:             forceTouchPoints[touchId].y = ay;            
rt300@0:         }
rt300@0:     }
rt300@0:     
rt300@0: }
rt300@0: //-----------------------------------------------------------
rt300@0: void GlobalForces::removeForceTouchPoint(int touchId){
rt300@0:     //
rt300@0:     for(int i = 0;i<maxForcePoints; i++){
rt300@0:         if(forceTouchPoints[i].tid == touchId){
rt300@0:             forceTouchPoints[i].tid = -1;          
rt300@0:         }
rt300@0:     } 
rt300@0: }
rt300@0: //-----------------------------------------------------------
rt300@0: TwoVector GlobalForces::getAllForceAt(double ax, double ay){
rt300@0:     //this is called for every mass point so work out most stuff in update()
rt300@0:     TwoVector force(0.0,0.0);
rt300@0:     double fmag, r;
rt300@0:     if(gravityOn){
rt300@0:         
rt300@0:         force.x += grav.x;
rt300@0:         force.y += grav.y;
rt300@0:     }
rt300@0:     
rt300@0:     // now touch points
rt300@0:      for(int i = 0;i<maxForcePoints; i++){
rt300@0:          // work out distance to force point and then use 1/r^2 rule 
rt300@0:          if(forceTouchPoints[i].tid != -1){
rt300@0:              TwoVector diff(forceTouchPoints[i].x - ax, forceTouchPoints[i].y - ay );
rt300@0:              r = diff.norm();
rt300@0:              if (r < 0.03){ // try avoid very small distances giving ridiculous forces
rt300@0:                  fmag = 0.0;
rt300@0:              }else{
rt300@0:                  fmag = touchStrength*1/(1000*(r*r));
rt300@0:              } 
rt300@0:             force.x -= fmag*diff.x/r;
rt300@0:             force.y -= fmag*diff.y/r;
rt300@0:              
rt300@0:          }
rt300@0:      }
rt300@0:     
rt300@0:     return force;
rt300@0: }
rt300@9: //-----------------------------------------------------------
rt300@9: 
rt300@9: Json::Value GlobalForces::convertToJsonForSaving(){
rt300@9:     
rt300@9:     Json::Value jgf;
rt300@9:     jgf["gravityOn"] = gravityOn;
rt300@9:     jgf["forceTouchOn"] = forceTouchOn;
rt300@9:     jgf["pressureOn"] = pressureOn;
rt300@9:     jgf["pressureAmt"] = pressureAmt;
rt300@9:     jgf["gravityAmt"] = gravityAmt;
rt300@9:     jgf["touchStrength"] = touchStrength;
rt300@9:     jgf["excitationStrength"] = excitationStrength;
rt300@9:     jgf["homingAmt"] = homingAmt;
rt300@9:     jgf["avFilterAmt"] = avFilterAmt;
rt300@9:     jgf["exciteShapeX"] = exciteShapeX;
rt300@9:     jgf["exciteShapeY"] = exciteShapeY;
rt300@9:     jgf["speedLimit"] = speedLimit;
rt300@9:     jgf["wallBounce"] = wallBounce;
rt300@9: 
rt300@9:     return jgf;
rt300@9: }
rt300@9: //-----------------------------------------------------------
rt300@9: 
rt300@9: void GlobalForces::setFromJson(Json::Value jgf){
rt300@9: 
rt300@9:     gravityOn = jgf["gravityOn"].asBool();
rt300@9:     forceTouchOn = jgf["forceTouchOn"].asBool();
rt300@9:     pressureOn = jgf["pressureOn"].asBool();
rt300@9:     pressureAmt = jgf["pressureAmt"].asDouble();
rt300@9:     gravityAmt = jgf["gravityAmt"].asDouble();
rt300@9:     touchStrength = jgf["touchStrength"].asDouble();
rt300@9:     excitationStrength = jgf["excitationStrength"].asDouble();
rt300@9:     homingAmt = jgf["homingAmt"].asDouble();
rt300@9:     avFilterAmt = jgf["avFilterAmt"].asDouble();
rt300@9:     exciteShapeX = jgf["exciteShapeX"].asInt();
rt300@9:     exciteShapeY = jgf["exciteShapeY"].asInt();
rt300@9:     speedLimit = jgf["speedLimit"].asDouble();
rt300@9:     wallBounce = jgf["wallBounce"].asDouble();
rt300@9: 
rt300@9: }