C++ FMaterial::GetUR方法代码示例

void FGLRenderer::DrawTexture(FTexture *img, DrawParms &parms)
{
	double xscale = parms.destwidth / parms.texwidth;
	double yscale = parms.destheight / parms.texheight;
	double x = parms.x - parms.left * xscale;
	double y = parms.y - parms.top * yscale;
	double w = parms.destwidth;
	double h = parms.destheight;
	float u1, v1, u2, v2;
	int light = 255;

	FMaterial * gltex = FMaterial::ValidateTexture(img, false);

	if (parms.colorOverlay && (parms.colorOverlay & 0xffffff) == 0)
	{
		// Right now there's only black. Should be implemented properly later
		light = 255 - APART(parms.colorOverlay);
		parms.colorOverlay = 0;
	}

	gl_SetRenderStyle(parms.style, !parms.masked, false);
	if (!img->bHasCanvas)
	{
		int translation = 0;
		if (!parms.alphaChannel)
		{
			if (parms.remap != NULL && !parms.remap->Inactive)
			{
				GLTranslationPalette * pal = static_cast<GLTranslationPalette*>(parms.remap->GetNative());
				if (pal) translation = -pal->GetIndex();
			}
		}
		gl_RenderState.SetMaterial(gltex, CLAMP_XY_NOMIP, translation, -1, !!(parms.style.Flags & STYLEF_RedIsAlpha));

		u1 = gltex->GetUL();
		v1 = gltex->GetVT();
		u2 = gltex->GetUR();
		v2 = gltex->GetVB();

	}
	else
	{
		gl_RenderState.SetMaterial(gltex, CLAMP_XY_NOMIP, 0, -1, false);
		u1 = 0.f;
		v1 = 1.f;
		u2 = 1.f;
		v2 = 0.f;
		gl_RenderState.SetTextureMode(TM_OPAQUE);
	}
	
	if (parms.flipX)
	{
		float temp = u1;
		u1 = u2;
		u2 = temp;
	}
	

	if (parms.windowleft > 0 || parms.windowright < parms.texwidth)
	{
		double wi = MIN(parms.windowright, parms.texwidth);
		x += parms.windowleft * xscale;
		w -= (parms.texwidth - wi + parms.windowleft) * xscale;

		u1 = float(u1 + parms.windowleft / parms.texwidth);
		u2 = float(u2 - (parms.texwidth - wi) / parms.texwidth);
	}

	PalEntry color;
	if (parms.style.Flags & STYLEF_ColorIsFixed)
	{
		color = parms.fillcolor;
	}
	else
	{
		color = PalEntry(light, light, light);
	}
	color.a = (BYTE)(parms.Alpha * 255);

	// scissor test doesn't use the current viewport for the coordinates, so use real screen coordinates
	int btm = (SCREENHEIGHT - screen->GetHeight()) / 2;
	btm = SCREENHEIGHT - btm;

	glEnable(GL_SCISSOR_TEST);
	int space = (static_cast<OpenGLFrameBuffer*>(screen)->GetTrueHeight()-screen->GetHeight())/2;
	glScissor(parms.lclip, btm - parms.dclip + space, parms.rclip - parms.lclip, parms.dclip - parms.uclip);
	
	gl_RenderState.SetColor(color);
	gl_RenderState.AlphaFunc(GL_GEQUAL, 0.f);
	gl_RenderState.Apply();

	FFlatVertex *ptr = GLRenderer->mVBO->GetBuffer();
	ptr->Set(x, y, 0, u1, v1); ptr++;
	ptr->Set(x, y + h, 0, u1, v2); ptr++;
	ptr->Set(x + w, y, 0, u2, v1); ptr++;
	ptr->Set(x + w, y + h, 0, u2, v2); ptr++;
	GLRenderer->mVBO->RenderCurrent(ptr, GL_TRIANGLE_STRIP);

	if (parms.colorOverlay)
	{
//.........这里部分代码省略.........

void FGLRenderer::DrawTexture(FTexture *img, DCanvas::DrawParms &parms)
{
	double xscale = parms.destwidth / parms.texwidth;
	double yscale = parms.destheight / parms.texheight;
	double x = parms.x - parms.left * xscale;
	double y = parms.y - parms.top * yscale;
	double w = parms.destwidth;
	double h = parms.destheight;
	float u1, v1, u2, v2, r, g, b;
	float light = 1.f;

	FMaterial * gltex = FMaterial::ValidateTexture(img);

	if (parms.colorOverlay && (parms.colorOverlay & 0xffffff) == 0)
	{
		// Right now there's only black. Should be implemented properly later
		light = 1.f - APART(parms.colorOverlay)/255.f;
		parms.colorOverlay = 0;
	}

	if (!img->bHasCanvas)
	{
		if (!parms.alphaChannel) 
		{
			int translation = 0;
			if (parms.remap != NULL && !parms.remap->Inactive)
			{
				GLTranslationPalette * pal = static_cast<GLTranslationPalette*>(parms.remap->GetNative());
				if (pal) translation = -pal->GetIndex();
			}
			gltex->BindPatch(CM_DEFAULT, translation);
		}
		else 
		{
			// This is an alpha texture
			gltex->BindPatch(CM_SHADE, 0);
		}

		u1 = gltex->GetUL();
		v1 = gltex->GetVT();
		u2 = gltex->GetUR();
		v2 = gltex->GetVB();
	}
	else
	{
		gltex->Bind(CM_DEFAULT, 0, 0);
		u2=1.f;
		v2=-1.f;
		u1 = v1 = 0.f;
		gl_RenderState.SetTextureMode(TM_OPAQUE);
	}
	
	if (parms.flipX)
	{
		float temp = u1;
		u1 = u2;
		u2 = temp;
	}
	

	if (parms.windowleft > 0 || parms.windowright < parms.texwidth)
	{
		x += parms.windowleft * xscale;
		w -= (parms.texwidth - parms.windowright + parms.windowleft) * xscale;

		u1 = float(u1 + parms.windowleft / parms.texwidth);
		u2 = float(u2 - (parms.texwidth - parms.windowright) / parms.texwidth);
	}

	if (parms.style.Flags & STYLEF_ColorIsFixed)
	{
		r = RPART(parms.fillcolor)/255.0f;
		g = GPART(parms.fillcolor)/255.0f;
		b = BPART(parms.fillcolor)/255.0f;
	}
	else
	{
		r = g = b = light;
	}
	
	// scissor test doesn't use the current viewport for the coordinates, so use real screen coordinates
	int btm = (SCREENHEIGHT - screen->GetHeight()) / 2;
	btm = SCREENHEIGHT - btm;

	glEnable(GL_SCISSOR_TEST);
	int space = (static_cast<OpenGLFrameBuffer*>(screen)->GetTrueHeight()-screen->GetHeight())/2;
	glScissor(parms.lclip, btm - parms.dclip + space, parms.rclip - parms.lclip, parms.dclip - parms.uclip);
	
	gl_SetRenderStyle(parms.style, !parms.masked, false);
	if (img->bHasCanvas)
	{
		gl_RenderState.SetTextureMode(TM_OPAQUE);
	}

	glColor4f(r, g, b, FIXED2FLOAT(parms.alpha));
	
	gl_RenderState.EnableAlphaTest(false);
	gl_RenderState.Apply();
	glBegin(GL_TRIANGLE_STRIP);
	glTexCoord2f(u1, v1);
//.........这里部分代码省略.........

//.........这里部分代码省略.........
	// now clip to the top plane
	float vzt=(ztop[1]-ztop[0])/linelength;
	float topleft=this->ztop[0]+vzt*left;
	float topright=this->ztop[0]+vzt*right;

	// completely below the wall
	if (topleft<dv[0].z && topright<dv[3].z) 
		return;

	if (topleft<dv[1].z || topright<dv[2].z)
	{
		// decal has to be clipped at the top
		// let texture clamping handle all extreme cases
		dv[1].v=(dv[1].z-topleft)/(dv[1].z-dv[0].z)*dv[0].v;
		dv[2].v=(dv[2].z-topright)/(dv[2].z-dv[3].z)*dv[3].v;
		dv[1].z=topleft;
		dv[2].z=topright;
	}

	// now clip to the bottom plane
	float vzb=(zbottom[1]-zbottom[0])/linelength;
	float bottomleft=this->zbottom[0]+vzb*left;
	float bottomright=this->zbottom[0]+vzb*right;

	// completely above the wall
	if (bottomleft>dv[1].z && bottomright>dv[2].z) 
		return;

	if (bottomleft>dv[0].z || bottomright>dv[3].z)
	{
		// decal has to be clipped at the bottom
		// let texture clamping handle all extreme cases
		dv[0].v=(dv[1].z-bottomleft)/(dv[1].z-dv[0].z)*(dv[0].v-dv[1].v) + dv[1].v;
		dv[3].v=(dv[2].z-bottomright)/(dv[2].z-dv[3].z)*(dv[3].v-dv[2].v) + dv[2].v;
		dv[0].z=bottomleft;
		dv[3].z=bottomright;
	}


	if (flipx)
	{
		float ur = tex->GetUR();
		for(i=0;i<4;i++) dv[i].u=ur-dv[i].u;
	}
	if (flipy)
	{
		float vb = tex->GetVB();
		for(i=0;i<4;i++) dv[i].v=vb-dv[i].v;
	}
	// fog is set once per wall in the calling function and not per decal!

	if (loadAlpha)
	{
		glColor4f(red, green, blue, a);

		if (glset.lightmode == 8)
		{
			if (gl_fixedcolormap)
				glVertexAttrib1f(VATTR_LIGHTLEVEL, 1.0);
			else
				glVertexAttrib1f(VATTR_LIGHTLEVEL, gl_CalcLightLevel(light, rel, false) / 255.0);
		}
	}
	else
	{
		if (glset.lightmode == 8)
		{
			gl_SetColor(light, rel, &p, a, extralight); // Korshun.
		}
		else
		{
			gl_SetColor(light, rel, &p, a);
		}
	}

	PalEntry fc = gl_RenderState.GetFogColor();
	if (decal->RenderStyle.BlendOp == STYLEOP_Add && decal->RenderStyle.DestAlpha == STYLEALPHA_One)
	{
		gl_RenderState.SetFog(0,-1);
	}


	gl_SetRenderStyle(decal->RenderStyle, false, false);

	// If srcalpha is one it looks better with a higher alpha threshold
	if (decal->RenderStyle.SrcAlpha == STYLEALPHA_One) gl_RenderState.AlphaFunc(GL_GEQUAL, gl_mask_threshold);
	else gl_RenderState.AlphaFunc(GL_GREATER, 0.f);

	gl_RenderState.Apply();
	glBegin(GL_TRIANGLE_FAN);
	for(i=0;i<4;i++)
	{
		glTexCoord2f(dv[i].u,dv[i].v);
		glVertex3f(dv[i].x,dv[i].z,dv[i].y);
	}
	glEnd();
	rendered_decals++;
	gl_RenderState.SetFog(fc,-1);
	gl_RenderState.SetDynLight(0,0,0);
}

//.........这里部分代码省略.........

	if (topleft<dv[1].z || topright<dv[2].z)
	{
		// decal has to be clipped at the top
		// let texture clamping handle all extreme cases
		dv[1].v=(dv[1].z-topleft)/(dv[1].z-dv[0].z)*dv[0].v;
		dv[2].v=(dv[2].z-topright)/(dv[2].z-dv[3].z)*dv[3].v;
		dv[1].z=topleft;
		dv[2].z=topright;
	}

	// now clip to the bottom plane
	float vzb=(zbottom[1]-zbottom[0])/linelength;
	float bottomleft=this->zbottom[0]+vzb*left;
	float bottomright=this->zbottom[0]+vzb*right;

	// completely above the wall
	if (bottomleft>dv[1].z && bottomright>dv[2].z) 
		return;

	if (bottomleft>dv[0].z || bottomright>dv[3].z)
	{
		// decal has to be clipped at the bottom
		// let texture clamping handle all extreme cases
		dv[0].v=(dv[1].z-bottomleft)/(dv[1].z-dv[0].z)*(dv[0].v-dv[1].v) + dv[1].v;
		dv[3].v=(dv[2].z-bottomright)/(dv[2].z-dv[3].z)*(dv[3].v-dv[2].v) + dv[2].v;
		dv[0].z=bottomleft;
		dv[3].z=bottomright;
	}


	if (flipx)
	{
		float ur = tex->GetUR();
		for(i=0;i<4;i++) dv[i].u=ur-dv[i].u;
	}
	if (flipy)
	{
		float vb = tex->GetVB();
		for(i=0;i<4;i++) dv[i].v=vb-dv[i].v;
	}

	// calculate dynamic light effect.
	if (gl_lights && GLRenderer->mLightCount && !gl_fixedcolormap && gl_light_sprites)
	{
		// Note: This should be replaced with proper shader based lighting.
		double x, y;
		decal->GetXY(seg->sidedef, x, y);
		gl_SetDynSpriteLight(NULL, x, y, zpos, sub);
	}

	// alpha color only has an effect when using an alpha texture.
	if (decal->RenderStyle.Flags & STYLEF_RedIsAlpha)
	{
		gl_RenderState.SetObjectColor(decal->AlphaColor|0xff000000);
	}




	gl_SetRenderStyle(decal->RenderStyle, false, false);
	gl_RenderState.SetMaterial(tex, CLAMP_XY, decal->Translation, 0, !!(decal->RenderStyle.Flags & STYLEF_RedIsAlpha));


	// If srcalpha is one it looks better with a higher alpha threshold
	if (decal->RenderStyle.SrcAlpha == STYLEALPHA_One) gl_RenderState.AlphaFunc(GL_GEQUAL, gl_mask_sprite_threshold);