Revision 1045 branches/simulator/projects/simulator/simulator/core/world.c

world.c (revision 1045)
61 61 
    point_t p1 = ray->p;
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    point_t p2 = {ray->p.x+cos(ray->d),ray->p.y+sin(ray->d)};
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#if DEBUG


  		
  




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    printf("(%g,%g) --> (%g,%g) with (%g,%g) --> (%g,%g)\n",p1.x,p1.y,p2.x,p2.y,p3.x,p3.y,p4.x,p4.y);


  		
  




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#endif


  		
  




  
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    //printf("(%g,%g) --> (%g,%g) with (%g,%g) --> (%g,%g)\n",p1.x,p1.y,p2.x,p2.y,p3.x,p3.y,p4.x,p4.y);


  		
  




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    denom = (p2.y-p1.y)*(p4.x-p3.x)-(p2.x-p1.x)*(p4.y-p3.y);


  		
  




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    if (denom == 0) {


  		
  




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	return RAY_MISS;


  		
  




......




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    xint = p3.x+ua*(p4.x-p3.x);


  		
  




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    yint = p3.y+ua*(p4.y-p3.y);


  		
  




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    dist = sqrt((xint-p1.x)*(xint-p1.x)+(yint-p1.y)*(yint-p1.y));


  		
  




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#if DEBUG


  		
  




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    printf("Got: %g\n", dist);


  		
  




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#endif


  		
  




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    return dist;


  		
  




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}


  		
  












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