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fermiVogle.tar.Z
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scale.c
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C/C++ Source or Header
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1996-02-07
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875b
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49 lines
#include "vogle.h"
/*
* scale
*
* Set up a scale matrix and premultiply it and
* the top matrix on the stack.
*
*/
void
scale(float x, float y, float z)
{
Token *tok;
if (!vdevice.initialised)
verror("scale: vogle not initialised");
if (vdevice.inobject) {
tok = newtokens(4);
tok[0].i = SCALE;
tok[1].f = x;
tok[2].f = y;
tok[3].f = z;
return;
}
/*
* Do the operations directly on the top matrix of
* the stack to speed things up.
*/
vdevice.transmat->m[0][0] *= x;
vdevice.transmat->m[0][1] *= x;
vdevice.transmat->m[0][2] *= x;
vdevice.transmat->m[0][3] *= x;
vdevice.transmat->m[1][0] *= y;
vdevice.transmat->m[1][1] *= y;
vdevice.transmat->m[1][2] *= y;
vdevice.transmat->m[1][3] *= y;
vdevice.transmat->m[2][0] *= z;
vdevice.transmat->m[2][1] *= z;
vdevice.transmat->m[2][2] *= z;
vdevice.transmat->m[2][3] *= z;
}