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Full v2.6 renderer.

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This commit is contained in:
Shyotl
2011-05-10 03:30:59 -05:00
parent 50310ba263
commit d1d6994419
117 changed files with 8031 additions and 1234 deletions
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86
indra/llrender/llrendersphere.cpp
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@@ -68,45 +68,6 @@ void drawSolidSphere(GLdouble radius, GLint slices, GLint stacks)
}
// lat = 0 is Z-axis
// lon = 0, lat = 90 at X-axis
void lat2xyz(LLVector3 * result, F32 lat, F32 lon)
{
// Convert a latitude and longitude to x,y,z on a normal sphere and return it in result
F32 r;
result->mV[VX] = (F32) (cos(lon * DEG_TO_RAD) * sin(lat * DEG_TO_RAD));
result->mV[VY] = (F32) (sin(lon * DEG_TO_RAD) * sin(lat * DEG_TO_RAD));
r = (F32) pow(result->mV[VX] * result->mV[VX] + result->mV[VY] * result->mV[VY], 0.5f);
if (r == 1.0f)
{
result->mV[VZ] = 0.0f;
}
else
{
result->mV[VZ] = (F32) pow(1 - r*r, 0.5f);
if (lat > 90.01)
{
result->mV[VZ] *= -1.0;
}
}
}
void lat2xyz_rad(LLVector3 * result, F32 lat, F32 lon)
{
// Convert a latitude and longitude to x,y,z on a normal sphere and return it in result
F32 r;
result->mV[VX] = (F32) (cos(lon) * sin(lat));
result->mV[VY] = (F32) (sin(lon) * sin(lat));
r = (F32) pow(result->mV[VX] * result->mV[VX] + result->mV[VY] * result->mV[VY], 0.5f);
if (r == 1.0f)
result->mV[VZ] = 0.0f;
else
{
result->mV[VZ] = (F32) pow(1 - r*r, 0.5f);
if (lat > F_PI_BY_TWO) result->mV[VZ] *= -1.0;
}
}
// A couple thoughts on sphere drawing:
// 1) You need more slices than stacks, but little less than 2:1
// 2) At low LOD, setting stacks to an odd number avoids a "band" around the equator, making things look smoother
@@ -181,3 +142,50 @@ void LLRenderSphere::render()
{
glCallList(mDList[0]);
}
inline LLVector3 polar_to_cart(F32 latitude, F32 longitude)
{
return LLVector3(sin(F_TWO_PI * latitude) * cos(F_TWO_PI * longitude),
sin(F_TWO_PI * latitude) * sin(F_TWO_PI * longitude),
cos(F_TWO_PI * latitude));
}
void LLRenderSphere::renderGGL()
{
S32 const LATITUDE_SLICES = 20;
S32 const LONGITUDE_SLICES = 30;
if (mSpherePoints.empty())
{
mSpherePoints.resize(LATITUDE_SLICES + 1);
for (S32 lat_i = 0; lat_i < LATITUDE_SLICES + 1; lat_i++)
{
mSpherePoints[lat_i].resize(LONGITUDE_SLICES + 1);
for (S32 lon_i = 0; lon_i < LONGITUDE_SLICES + 1; lon_i++)
{
F32 lat = (F32)lat_i / LATITUDE_SLICES;
F32 lon = (F32)lon_i / LONGITUDE_SLICES;
mSpherePoints[lat_i][lon_i] = polar_to_cart(lat, lon);
}
}
}
gGL.begin(LLRender::TRIANGLES);
for (S32 lat_i = 0; lat_i < LATITUDE_SLICES; lat_i++)
{
for (S32 lon_i = 0; lon_i < LONGITUDE_SLICES; lon_i++)
{
gGL.vertex3fv(mSpherePoints[lat_i][lon_i].mV);
gGL.vertex3fv(mSpherePoints[lat_i][lon_i+1].mV);
gGL.vertex3fv(mSpherePoints[lat_i+1][lon_i].mV);
gGL.vertex3fv(mSpherePoints[lat_i+1][lon_i].mV);
gGL.vertex3fv(mSpherePoints[lat_i][lon_i+1].mV);
gGL.vertex3fv(mSpherePoints[lat_i+1][lon_i+1].mV);
}
}
gGL.end();
}