Re: C to Objective-C
Re: C to Objective-C
- Subject: Re: C to Objective-C
- From: "Clark S. Cox III" <email@hidden>
- Date: Fri, 4 Oct 2002 14:27:40 -0400
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On Friday, Oct 4, 2002, at 14:22 US/Eastern, Brent Gulanowski wrote:
On Friday, October 4, 2002, at 12:37 PM, Clark S. Cox III wrote:
On Friday, Oct 4, 2002, at 12:18 US/Eastern, Ondra Cada wrote:
On Friday, October 4, 2002, at 05:17 , Clark S. Cox III wrote:
void vertices(float xVert[], float yVert[], int TOTAL)
{
int i;
for(i=0; i < TOTAL; i++) {
glTranslatef(xVert[i], yVert[i], 0.0);
...
Or, even better:
- - (void)verticesX:(const float*)xVert Y:(const float*)yVert
T:(size_t)TOTAL;
You sure? I don't know what and how glTranslate does, but it looks
very like it wants to *change* them.
Yep, notice that the arrays are dereferenced (by the array
subscript) before passing to glTranslate, that means that a plain ol'
float is getting passed. Plus glTranslatef is a standard OpenGL
function declared as (or close to):
void glTranslatef(float, float, float);
Uhhh, op was trying to pass a pair of arrays, not plain floats.
Look again at the OP's function call:
glTranslatef(xVert[i], yVert[i], 0.0);
xVert is an array of floats, therefore xVert[i] is *a single float*
yVert is an array of floats, therefore yVert[i] is *a single float*
The OP is not passing any arrays to glTranslatef(), he was passing
three floats, nothing more, nothing less.
You want him to call your method inside a loop?
No, the method (and the function it is based on) already contains the
loop.
- --
http://homepage.mac.com/clarkcox3/
email@hidden
Clark S. Cox, III
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