Are sin/cos boken/non-standard in pspdev?

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Kojima
Posts: 275
Joined: Mon Jun 26, 2006 3:49 am

Are sin/cos boken/non-standard in pspdev?

Post by Kojima »

Are sin/cos different than usual implentations? I ask cos I've experienced a number of problems when porting the rotation/matrix code of my engine.

I convert the angle (In range of 0-360) to a radian and log the output in a txt file. the output is below.
Note the dramatic change in output from angle 1 to angle 2.

Here's my degree to radian function,

Code: Select all

const float PI = 3.14159265;

inline float DegToRad(float ang)
{

	return ang*180.0f/PI;
}

Code: Select all

Angle:1 
 Cos Output:0.733657 
 
Angle:2 
 Cos Output:0.076504 
 
Angle:3 
 Cos Output:-0.621401 
 
Angle:4 
 Cos Output:-0.988294 
 
Angle:5 
 Cos Output:-0.828736 
 
Angle:6 
 Cos Output:-0.227722 
 
Angle:7 
 Cos Output:0.494597 
 
Angle:8 
 Cos Output:0.953451 
 
Angle:9 
 Cos Output:0.904414 
 
Angle:10 
 Cos Output:0.373608 
 
Angle:11 
 Cos Output:-0.356214 
 
Angle:12 
 Cos Output:-0.896286 
 
Angle:13 
 Cos Output:-0.958918 
 
Angle:14 
 Cos Output:-0.510747 
 
Angle:15 
 Cos Output:0.209491 
 
Angle:16 
 Cos Output:0.818137 
 
Angle:17 
 Cos Output:0.990972 
 
Angle:18 
 Cos Output:0.635929 
 
Angle:19 
 Cos Output:-0.057864 
 
Angle:20 
 Cos Output:-0.720834 
 
Angle:21 
 Cos Output:-0.999825 
 
Angle:22 
 Cos Output:-0.746223 
 
Angle:23 
 Cos Output:-0.095118 
 
Angle:24 
 Cos Output:0.606656 
 
Angle:25 
 Cos Output:0.985272 
 
Angle:26 
 Cos Output:0.839047 
 
Angle:27 
 Cos Output:0.245873 
 
Angle:28 
 Cos Output:-0.478274 
 
Angle:29 
 Cos Output:-0.947651 
 
Angle:30 
 Cos Output:-0.912227 
 
Angle:31 
 Cos Output:-0.390871 
 
Angle:32 
 Cos Output:0.338696 
 
Angle:33 
 Cos Output:0.887844 
 
Angle:34 
 Cos Output:0.964050 
 
Angle:35 
 Cos Output:0.526719 
 
Angle:36 
 Cos Output:-0.191188 
 
Angle:37 
 Cos Output:-0.807324 
 
Angle:38 
 Cos Output:-0.993303 
 
Angle:39 
 Cos Output:-0.650143 
 
Angle:40 
 Cos Output:0.039204 
 
Angle:41 
 Cos Output:0.707846 
 
Angle:42 
 Cos Output:0.999302 
 
Angle:43 
 Cos Output:0.758450 
 
Angle:44 
 Cos Output:0.113698 
 
Angle:45 
 Cos Output:-0.591797 
 
Angle:46 
 Cos Output:-0.981905 
 
Angle:47 
 Cos Output:-0.849000 
 
Angle:48 
 Cos Output:-0.263938 
 
Angle:49 
 Cos Output:0.461893 
 
Angle:50 
 Cos Output:0.941520 
 
Angle:51 
 Cos Output:0.919673 
 
Angle:52 
 Cos Output:0.407999 
 
Angle:53 
 Cos Output:-0.321175 
 
Angle:54 
 Cos Output:-0.879093 
 
Angle:55 
 Cos Output:-0.968816 
 
Angle:56 
 Cos Output:-0.542507 
 
Angle:57 
 Cos Output:0.172938 
 
Angle:58 
 Cos Output:0.796085 
 
Angle:59 
 Cos Output:0.995277 
 
Angle:60 
 Cos Output:0.664315 
 
Angle:61 
 Cos Output:-0.020652 
 
Angle:62 
 Cos Output:-0.694439 
 
Angle:63 
 Cos Output:-0.998437 
 
Angle:64 
 Cos Output:-0.770570 
 
Angle:65 
 Cos Output:-0.132117 
 
Angle:66 
 Cos Output:0.576535 
 
Angle:67 
 Cos Output:0.978221 
 
Angle:68 
 Cos Output:0.858785 
 
Angle:69 
 Cos Output:0.281794 
 
Angle:70 
 Cos Output:-0.445134 
 
Angle:71 
 Cos Output:-0.935105 
 
Angle:72 
 Cos Output:-0.926894 
 
Angle:73 
 Cos Output:-0.424873 
 
Angle:74 
 Cos Output:0.303543 
 
Angle:75 
 Cos Output:0.869975 
 
Angle:76 
 Cos Output:0.973304 
 
Angle:77 
 Cos Output:0.558005 
 
Angle:78 
 Cos Output:-0.154628 
 
Angle:79 
 Cos Output:-0.784867 
 
Angle:80 
 Cos Output:-0.996926 
 
Angle:81 
 Cos Output:-0.678073 
 
Angle:82 
 Cos Output:0.002093 
 
Angle:83 
 Cos Output:0.681144 
 
Angle:84 
 Cos Output:0.997209 
 
Angle:85 
 Cos Output:0.782267 
 
Angle:86 
 Cos Output:0.150492 
 
Angle:87 
 Cos Output:-0.561473 
 
Angle:88 
 Cos Output:-0.974146 
 
Angle:89 
 Cos Output:-0.868146 
 
Angle:90 
 Cos Output:-0.299553 
 
Angle:91 
 Cos Output:0.428658 
 
Angle:92 
 Cos Output:0.928276 
 
Angle:93 
 Cos Output:0.933701 
 
Angle:94 
 Cos Output:0.441601 
 
Angle:95 
 Cos Output:-0.285807 
 
Angle:96 
 Cos Output:-0.860674 
 
Angle:97 
 Cos Output:-0.977396 
 
Angle:98 
 Cos Output:-0.573310 
 
Angle:99 
 Cos Output:0.136265 
 
Angle:100 
 Cos Output:0.772922 
 
Angle:101 
 Cos Output:0.998208 
 
Angle:102 
 Cos Output:0.691597 
 
Angle:103 
 Cos Output:0.016467 
 
Angle:104 
 Cos Output:-0.667074 
 
Angle:105 
 Cos Output:-0.995652 
 
Angle:106 
 Cos Output:-0.793693 
 
Angle:107 
 Cos Output:-0.168814 
 
Angle:108 
 Cos Output:0.545610 
 
Angle:109 
 Cos Output:0.969785 
 
Angle:110 
 Cos Output:0.877208 
 
Angle:111 
 Cos Output:0.317208 
 
Angle:112 
 Cos Output:-0.411371 
 
Angle:113 
 Cos Output:-0.921214 
 
Angle:114 
 Cos Output:-0.940185 
 
Angle:115 
 Cos Output:-0.458176 
 
Angle:116 
 Cos Output:0.267502 
 
Angle:117 
 Cos Output:0.851076 
 
Angle:118 
 Cos Output:0.981151 
 
Angle:119 
 Cos Output:0.588418 
 
Angle:120 
 Cos Output:-0.117371 
 
Angle:121 
 Cos Output:-0.761012 
 
Angle:122 
 Cos Output:-0.999147 
 
Angle:123 
 Cos Output:-0.704884 
 
Angle:124 
 Cos Output:-0.035509 
 
Angle:125 
 Cos Output:0.653133 
 
Angle:126 
 Cos Output:0.993751 
 
Angle:127 
 Cos Output:0.804847 
 
Angle:128 
 Cos Output:0.187557 
 
Angle:129 
 Cos Output:-0.529962 
 
Angle:130 
 Cos Output:-0.965090 
 
Angle:131 
 Cos Output:-0.885967 
 
Angle:132 
 Cos Output:-0.335215 
 
Angle:133 
 Cos Output:0.394384 
 
Angle:134 
 Cos Output:0.913834 
 
Angle:135 
 Cos Output:0.946346 
 
Angle:136 
 Cos Output:0.475024 
 
Angle:137 
 Cos Output:-0.249573 
 
Angle:138 
 Cos Output:-0.841185 
 
Angle:139 
 Cos Output:-0.984569 
 
Angle:140 
 Cos Output:-0.603712 
 
Angle:141 
 Cos Output:0.098919 
 
Angle:142 
 Cos Output:0.748841 
 
Angle:143 
 Cos Output:0.999752 
 
Angle:144 
 Cos Output:0.718267 
 
Angle:145 
 Cos Output:0.054051 
 
Angle:146 
 Cos Output:-0.638966 
 
Angle:147 
 Cos Output:-0.991508 
 
Angle:148 
 Cos Output:-0.815723 
 
Angle:149 
 Cos Output:-0.205277 
 
Angle:150 
 Cos Output:0.513713 
 
Angle:151 
 Cos Output:0.959926 
 
Angle:152 
 Cos Output:0.894640 
 
Angle:153 
 Cos Output:0.352643 
 
Angle:154 
 Cos Output:-0.377261 
 
Angle:155 
 Cos Output:-0.906140 
 
Angle:156 
 Cos Output:-0.952180 
 
Angle:157 
 Cos Output:-0.490849 
 
Angle:158 
 Cos Output:0.232033 
 
Angle:159 
 Cos Output:0.830732 
 
Angle:160 
 Cos Output:0.987723 
 
Angle:161 
 Cos Output:0.618404 
 
Angle:162 
 Cos Output:-0.080434 
 
Angle:163 
 Cos Output:-0.736412 
 
Angle:164 
 Cos Output:-0.999991 
 
Angle:165 
 Cos Output:-0.730723 
 
Angle:166 
 Cos Output:-0.072087 
 
Angle:167 
 Cos Output:0.624198 
 
Angle:168 
 Cos Output:0.988851 
 
Angle:169 
 Cos Output:0.826593 
 
Angle:170 
 Cos Output:0.223882 
 
Angle:171 
 Cos Output:-0.498125 
 
Angle:172 
 Cos Output:-0.954705 
 
Angle:173 
 Cos Output:-0.902568 
 
Angle:174 
 Cos Output:-0.369495 
 
Angle:175 
 Cos Output:0.359552 
 
Angle:176 
 Cos Output:0.897919 
 
Angle:177 
 Cos Output:0.957827 
 
Angle:178 
 Cos Output:0.507355 
 
Angle:179 
 Cos Output:-0.213463 
 
Angle:180 
 Cos Output:-0.820536
Here's the actual code I used to generate the output. It relies havily on my engine so you won't be able to run it without some modifcation. sorry.

Code: Select all

	while(1)
  {
 
  	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);		// Clear The Screen And The Depth Buffer
		//vcam->Move(0,0,0);
	//	vcam->Other(joy->_x,0,joy->_y);
		glLoadIdentity();
		
  	joy->Update();
 		
 		cy++;
 		if(cy>360) cy=0;
 		//vcam->Rotate(cp,cy,0);
 		  	
  	
  	//FontRenderer->RenderText(0,0,"Gui Test Alpha 1");
  
	
 		Renderer->RenderScene(); 	  
 		
 		sys->Draw2D();
 		
 		if( !(yawtxt == NULL ) )
 		{
 			free( (void *)yawtxt );
 		}
 		
 		angtxt = StringUtil->Num( (int)cy );
 		yawtxt = StringUtil->Num( (float)cos(DegToRad(cy)) ); 
 		FontRenderer->RenderText( 0,0,angtxt );
 		FontRenderer->RenderText( 0,20,yawtxt );
 	  
 	  Logger->Log("Angle:%s Cos Output:%s \n",angtxt,yawtxt );
 	  
 	//	sys->Draw2D();
		if(joy->_select==1)
		{
			sceKernelExitGame();
		}
  	if( joy->_rtrigger )
  	{
  		screenshot("mplay");
  	}
  	glutSwapBuffers();
  }
So are sin/cos different than say visual C++ or Blitzmax? If not degrees or radians as input, what else could it be? Any help would be much appreciated, this has completely stalled our game.
Top
jockyw2001
Posts: 339
Joined: Thu Sep 29, 2005 4:19 pm

Post by jockyw2001 »

if you convert from degree to radian the formula is:
return ang*PI/180.0f;
Top
Kojima
Posts: 275
Joined: Mon Jun 26, 2006 3:49 am

Post by Kojima »

You're right Jock, I just checked and I mistakenly used the same code as I did for RadToDeg. Thanks for the spot.
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