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- use the same formula for calculating 3DMidTex offsets as the renderer when per-sidedef scaling is used.

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This reuses the FTexCoordInfo class the hardware renderer had been using to calculate wall texture offsetting.
The software renderers still need this sorted out to bring them in line with the rest of the code, though, but they do not have this code sufficiently well organized to make this a straightforward task.
This commit is contained in:
Christoph Oelckers 2018-11-17 18:24:14 +01:00
commit 08fe9c375b
5 changed files with 145 additions and 133 deletions
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116
src/textures/texture.cpp
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@ -1543,3 +1543,119 @@ CCMD (printspans)
#endif
//===========================================================================
//
// Coordinate helper.
// The only reason this is even needed is that many years ago someone
// was convinced that having per-texel panning on walls was a good idea.
// If it wasn't for this relatively useless feature the entire positioning
// code for wall textures could be a lot simpler.
//
//===========================================================================
//===========================================================================
//
//
//
//===========================================================================
float FTexCoordInfo::RowOffset(float rowoffset) const
{
float tscale = fabs(mTempScale.Y);
float scale = fabs(mScale.Y);
if (tscale == 1.f)
{
if (scale == 1.f || mWorldPanning) return rowoffset;
else return rowoffset / scale;
}
else
{
if (mWorldPanning) return rowoffset / tscale;
else return rowoffset / scale;
}
}
//===========================================================================
//
//
//
//===========================================================================
float FTexCoordInfo::TextureOffset(float textureoffset) const
{
float tscale = fabs(mTempScale.X);
float scale = fabs(mScale.X);
if (tscale == 1.f)
{
if (scale == 1.f || mWorldPanning) return textureoffset;
else return textureoffset / scale;
}
else
{
if (mWorldPanning) return textureoffset / tscale;
else return textureoffset / scale;
}
}
//===========================================================================
//
// Returns the size for which texture offset coordinates are used.
//
//===========================================================================
float FTexCoordInfo::TextureAdjustWidth() const
{
if (mWorldPanning)
{
float tscale = fabs(mTempScale.X);
if (tscale == 1.f) return (float)mRenderWidth;
else return mWidth / fabs(tscale);
}
else return (float)mWidth;
}
//===========================================================================
//
// Retrieve texture coordinate info for per-wall scaling
//
//===========================================================================
void FTexCoordInfo::GetFromTexture(FTexture *tex, float x, float y)
{
if (x == 1.f)
{
mRenderWidth = tex->GetScaledWidth();
mScale.X = (float)tex->Scale.X;
mTempScale.X = 1.f;
}
else
{
float scale_x = x * (float)tex->Scale.X;
mRenderWidth = xs_CeilToInt(tex->GetWidth() / scale_x);
mScale.X = scale_x;
mTempScale.X = x;
}
if (y == 1.f)
{
mRenderHeight = tex->GetScaledHeight();
mScale.Y = (float)tex->Scale.Y;
mTempScale.Y = 1.f;
}
else
{
float scale_y = y * (float)tex->Scale.Y;
mRenderHeight = xs_CeilToInt(tex->GetHeight() / scale_y);
mScale.Y = scale_y;
mTempScale.Y = y;
}
if (tex->bHasCanvas)
{
mScale.Y = -mScale.Y;
mRenderHeight = -mRenderHeight;
}
mWorldPanning = tex->bWorldPanning;
mWidth = tex->GetWidth();
}