C++ FMaterial::TextureHeight方法代码示例

void FGLInterface::RenderTextureView (FCanvasTexture *tex, AActor *Viewpoint, int FOV)
{
	FMaterial * gltex = FMaterial::ValidateTexture(tex, false);

	int width = gltex->TextureWidth();
	int height = gltex->TextureHeight();

	gl_fixedcolormap=CM_DEFAULT;
	gl_RenderState.SetFixedColormap(CM_DEFAULT);

	if (gl.legacyMode)
	{
		// In legacy mode, fail if the requested texture is too large.
		if (gltex->GetWidth() > screen->GetWidth() || gltex->GetHeight() > screen->GetHeight()) return;
		glFlush();
	}
	else
	{
		GLRenderer->StartOffscreen();
		gltex->BindToFrameBuffer();
	}

	GL_IRECT bounds;
	bounds.left=bounds.top=0;
	bounds.width=FHardwareTexture::GetTexDimension(gltex->GetWidth());
	bounds.height=FHardwareTexture::GetTexDimension(gltex->GetHeight());

	GLRenderer->RenderViewpoint(Viewpoint, &bounds, FOV, (float)width/height, (float)width/height, false, false);

	if (gl.legacyMode)
	{
		glFlush();
		gl_RenderState.SetMaterial(gltex, 0, 0, -1, false);
		glCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 0, 0, bounds.width, bounds.height);
	}
	else
	{
		GLRenderer->EndOffscreen();
	}

	tex->SetUpdated();
	camtexcount++;
}

void FGLRenderer::RenderTextureView(FCanvasTexture *tex, AActor *Viewpoint, double FOV)
{
	// This doesn't need to clear the fake flat cache. It can be shared between camera textures and the main view of a scene.
	FMaterial * gltex = FMaterial::ValidateTexture(tex, false);

	int width = gltex->TextureWidth();
	int height = gltex->TextureHeight();

	StartOffscreen();
	BindToFrameBuffer(gltex);

	IntRect bounds;
	bounds.left = bounds.top = 0;
	bounds.width = FHardwareTexture::GetTexDimension(gltex->GetWidth());
	bounds.height = FHardwareTexture::GetTexDimension(gltex->GetHeight());

	FRenderViewpoint texvp;
	RenderViewpoint(texvp, Viewpoint, &bounds, FOV, (float)width / height, (float)width / height, false, false);

	EndOffscreen();

	tex->SetUpdated(true);
	static_cast<OpenGLFrameBuffer*>(screen)->camtexcount++;
}

//.........这里部分代码省略.........
				green = clamp<float>(result[1]+green, 0, 1.0f);
				blue = clamp<float>(result[2]+blue, 0, 1.0f);
			}
			else
			{
				gl_RenderState.SetDynLight(result[0], result[1], result[2]);
			}
		}

		BYTE R = xs_RoundToInt(r * red);
		BYTE G = xs_RoundToInt(g * green);
		BYTE B = xs_RoundToInt(b * blue);

		gl_ModifyColor(R,G,B, Colormap.colormap);

		red = R/255.f;
		green = G/255.f;
		blue = B/255.f;
	}	
	else
	{
		loadAlpha = false;
		
		red = 1.f;
		green = 1.f;
		blue = 1.f;
	}
	
	
	a = FIXED2FLOAT(decal->Alpha);
	
	// now clip the decal to the actual polygon
	float decalwidth = tex->TextureWidth(GLUSE_PATCH)  * FIXED2FLOAT(decal->ScaleX);
	float decalheight= tex->TextureHeight(GLUSE_PATCH) * FIXED2FLOAT(decal->ScaleY);
	float decallefto = tex->GetLeftOffset(GLUSE_PATCH) * FIXED2FLOAT(decal->ScaleX);
	float decaltopo  = tex->GetTopOffset(GLUSE_PATCH)  * FIXED2FLOAT(decal->ScaleY);

	
	float leftedge = glseg.fracleft * side->TexelLength;
	float linelength = glseg.fracright * side->TexelLength - leftedge;

	// texel index of the decal's left edge
	float decalpixpos = (float)side->TexelLength * decal->LeftDistance / (1<<30) - (flipx? decalwidth-decallefto : decallefto) - leftedge;

	float left,right;
	float lefttex,righttex;

	// decal is off the left edge
	if (decalpixpos < 0)
	{
		left = 0;
		lefttex = -decalpixpos;
	}
	else
	{
		left = decalpixpos;
		lefttex = 0;
	}
	
	// decal is off the right edge
	if (decalpixpos + decalwidth > linelength)
	{
		right = linelength;
		righttex = right - decalpixpos;
	}
	else

//.........这里部分代码省略.........
		{
			zpos = decal->Z + frontsector->GetPlaneTexZ(sector_t::floor);
		}
		else
		{
			zpos = decal->Z + frontsector->GetPlaneTexZ(sector_t::ceiling);
		}
	}
	
	if (decal->RenderFlags & RF_FULLBRIGHT)
	{
		light = 255;
		rel = 0;
	}
	else
	{
		light = lightlevel;
		rel = rellight + getExtraLight();
	}
	
	FColormap p = Colormap;
	
	if (glset.nocoloredspritelighting)
	{
		p.Decolorize();
	}
	
	
	
	a = decal->Alpha;
	
	// now clip the decal to the actual polygon
	float decalwidth = tex->TextureWidth()  * decal->ScaleX;
	float decalheight= tex->TextureHeight() * decal->ScaleY;
	float decallefto = tex->GetLeftOffset() * decal->ScaleX;
	float decaltopo  = tex->GetTopOffset()  * decal->ScaleY;

	
	float leftedge = glseg.fracleft * side->TexelLength;
	float linelength = glseg.fracright * side->TexelLength - leftedge;

	// texel index of the decal's left edge
	float decalpixpos = (float)side->TexelLength * decal->LeftDistance - (flipx? decalwidth-decallefto : decallefto) - leftedge;

	float left,right;
	float lefttex,righttex;

	// decal is off the left edge
	if (decalpixpos < 0)
	{
		left = 0;
		lefttex = -decalpixpos;
	}
	else
	{
		left = decalpixpos;
		lefttex = 0;
	}
	
	// decal is off the right edge
	if (decalpixpos + decalwidth > linelength)
	{
		right = linelength;
		righttex = right - decalpixpos;
	}
	else