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[ADD] Adding GRRLIB_DrawSphere

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[CHG] Light and primitive demo to add a sphere
This commit is contained in:
N0NameN0 2010-01-06 13:35:27 +00:00
parent 864f2610e9
commit d352bd354d
3 changed files with 41 additions and 3 deletions
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34
GRRLIB/GRRLIB/GRRLIB_3D.c
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@ -286,3 +286,37 @@ void GRRLIB_DrawTorus(f32 r, f32 R, int nsides, int rings, bool filled){
}
}
/**
* Draw a Sphere (with normal).
* @param r Radius of the Sprhere.
* @param lats Number of lattitudes.
* @param longs Number of Longitutes.
* @param filled Wired or not.
*/
void GRRLIB_DrawSphere(f32 r, int lats, int longs, bool filled) {
int i,j;
for(i = 0; i <= lats; i++) {
f32 lat0 = M_PI * (-0.5F + (f32) (i - 1) / lats);
f32 z0 = sin(lat0);
f32 zr0 = cos(lat0);
f32 lat1 = M_PI * (-0.5F + (f32) i / lats);
f32 z1 = sin(lat1);
f32 zr1 = cos(lat1);
if(filled) GX_Begin(GX_TRIANGLESTRIP, GX_VTXFMT0, 2*(longs+1));
else GX_Begin(GX_LINESTRIP, GX_VTXFMT0, 2*(longs+1));
for(j = 0; j <= longs; j++) {
f32 lng = 2 * M_PI * (f32) (j - 1) / longs;
f32 x = cos(lng);
f32 y = sin(lng);
GX_Position3f32(x * zr0 * r, y * zr0 * r, z0 * r);
GX_Normal3f32(x * zr0 * r, y * zr0 * r, z0 * r);
GX_Position3f32(x * zr1 * r, y * zr1 * r, z1 * r);
GX_Normal3f32(x * zr1 * r, y * zr1 * r, z1 * r);
}
GX_End();
}
}

1
GRRLIB/GRRLIB/grrlib/GRRLIB__lib.h
View file

@ -151,6 +151,7 @@ void GRRLIB_InitLight(u8 id, guVector lpos, u32 lcol);
void GRRLIB_LightOff(void);
void GRRLIB_LightSwitch(u8 id, u32 ambcol, u32 matcol, u8 colsrc);
void GRRLIB_DrawTorus(f32 r, f32 R, int nsides, int rings, bool filled);
void GRRLIB_DrawSphere(f32 r, int lats, int longs, bool filled);
//------------------------------------------------------------------------------
// GRRLIB_Freetype.c - FreeType function for GRRLIB

9
examples/3D_LightDiffuse/source/main.c
View file

@ -50,9 +50,12 @@ int main() {
GRRLIB_LightSwitch(GX_LIGHT0|GX_LIGHT1|GX_LIGHT2,RGBA(Amb,Amb,Amb,0xFF),0x808080FF,0);
GRRLIB_ObjectView(0,0,0, a,a*2,a*3, 1,1,1);
GRRLIB_DrawTorus(0.4f, 2.0f, 20, 50, 0);
GRRLIB_ObjectView(0,0,0, -a,-a*2,-a*3, 1,1,1);
GRRLIB_DrawTorus(0.8f, 4.0f, 20, 50, 1);
GRRLIB_DrawTorus(0.4f, 3.0f, 20, 50, 1);
GRRLIB_ObjectView(0,0,0, -a,a*2,-a*3, 1,1,1);
GRRLIB_DrawSphere(2.0f, 30, 30, 0);
a+=0.5f;