C++ Plane::DistToPoint方法代码示例

void GLWall::SetupLights()
{
	// check for wall types which cannot have dynamic lights on them (portal types never get here so they don't need to be checked.)
	switch (type)
	{
	case RENDERWALL_FOGBOUNDARY:
	case RENDERWALL_MIRRORSURFACE:
	case RENDERWALL_COLOR:
	case RENDERWALL_COLORLAYER:
		return;
	}

	float vtx[]={glseg.x1,zbottom[0],glseg.y1, glseg.x1,ztop[0],glseg.y1, glseg.x2,ztop[1],glseg.y2, glseg.x2,zbottom[1],glseg.y2};
	Plane p;

	lightdata.Clear();
	p.Init(vtx,4);

	if (!p.ValidNormal()) 
	{
		return;
	}
	FLightNode *node;
	if (seg->sidedef == NULL)
	{
		node = NULL;
	}
	else if (!(seg->sidedef->Flags & WALLF_POLYOBJ))
	{
		node = seg->sidedef->lighthead;
	}
	else if (sub)
	{
		// Polobject segs cannot be checked per sidedef so use the subsector instead.
		node = sub->lighthead;
	}
	else node = NULL;

	// Iterate through all dynamic lights which touch this wall and render them
	while (node)
	{
		if (!(node->lightsource->flags2&MF2_DORMANT))
		{
			iter_dlight++;

			Vector fn, pos;

			float x = FIXED2FLOAT(node->lightsource->X());
			float y = FIXED2FLOAT(node->lightsource->Y());
			float z = FIXED2FLOAT(node->lightsource->Z());
			float dist = fabsf(p.DistToPoint(x, z, y));
			float radius = (node->lightsource->GetRadius() * gl_lights_size);
			float scale = 1.0f / ((2.f * radius) - dist);

			if (radius > 0.f && dist < radius)
			{
				Vector nearPt, up, right;

				pos.Set(x,z,y);
				fn=p.Normal();
				fn.GetRightUp(right, up);

				Vector tmpVec = fn * dist;
				nearPt = pos + tmpVec;

				Vector t1;
				int outcnt[4]={0,0,0,0};
				texcoord tcs[4];

				// do a quick check whether the light touches this polygon
				for(int i=0;i<4;i++)
				{
					t1.Set(&vtx[i*3]);
					Vector nearToVert = t1 - nearPt;
					tcs[i].u = (nearToVert.Dot(right) * scale) + 0.5f;
					tcs[i].v = (nearToVert.Dot(up) * scale) + 0.5f;

					if (tcs[i].u<0) outcnt[0]++;
					if (tcs[i].u>1) outcnt[1]++;
					if (tcs[i].v<0) outcnt[2]++;
					if (tcs[i].v>1) outcnt[3]++;

				}
				if (outcnt[0]!=4 && outcnt[1]!=4 && outcnt[2]!=4 && outcnt[3]!=4) 
				{
					gl_GetLight(p, node->lightsource, true, false, lightdata);
				}
			}
		}
		node = node->nextLight;
	}

	dynlightindex = GLRenderer->mLights->UploadLights(lightdata);
}

void GLWall::SetupLights()
{
	float vtx[]={glseg.x1,zbottom[0],glseg.y1, glseg.x1,ztop[0],glseg.y1, glseg.x2,ztop[1],glseg.y2, glseg.x2,zbottom[1],glseg.y2};
	Plane p;

	lightdata.Clear();
	p.Init(vtx,4);

	if (!p.ValidNormal()) 
	{
		return;
	}
	for(int i=0;i<2;i++)
	{
		FLightNode *node;
		if (!seg->bPolySeg)
		{
			// Iterate through all dynamic lights which touch this wall and render them
			if (seg->sidedef)
			{
				node = seg->sidedef->lighthead[i];
			}
			else node = NULL;
		}
		else if (sub)
		{
			// To avoid constant rechecking for polyobjects use the subsector's lightlist instead
			node = sub->lighthead[i];
		}
		else node = NULL;

		while (node)
		{
			if (!(node->lightsource->flags2&MF2_DORMANT))
			{
				iter_dlight++;

				Vector fn, pos;

				float x = FIXED2FLOAT(node->lightsource->x);
				float y = FIXED2FLOAT(node->lightsource->y);
				float z = FIXED2FLOAT(node->lightsource->z);
				float dist = fabsf(p.DistToPoint(x, z, y));
				float radius = (node->lightsource->GetRadius() * gl_lights_size);
				float scale = 1.0f / ((2.f * radius) - dist);

				if (radius > 0.f && dist < radius)
				{
					Vector nearPt, up, right;

					pos.Set(x,z,y);
					fn=p.Normal();
					fn.GetRightUp(right, up);

					Vector tmpVec = fn * dist;
					nearPt = pos + tmpVec;

					Vector t1;
					int outcnt[4]={0,0,0,0};
					texcoord tcs[4];

					// do a quick check whether the light touches this polygon
					for(int i=0;i<4;i++)
					{
						t1.Set(&vtx[i*3]);
						Vector nearToVert = t1 - nearPt;
						tcs[i].u = (nearToVert.Dot(right) * scale) + 0.5f;
						tcs[i].v = (nearToVert.Dot(up) * scale) + 0.5f;

						if (tcs[i].u<0) outcnt[0]++;
						if (tcs[i].u>1) outcnt[1]++;
						if (tcs[i].v<0) outcnt[2]++;
						if (tcs[i].v>1) outcnt[3]++;

					}
					if (outcnt[0]!=4 && outcnt[1]!=4 && outcnt[2]!=4 && outcnt[3]!=4) 
					{
						gl_GetLight(p, node->lightsource, Colormap.colormap, true, false, lightdata);
					}
				}
			}
			node = node->nextLight;
		}
	}
	int numlights[3];

	lightdata.Combine(numlights, gl.MaxLights());
	if (numlights[2] > 0)
	{
		draw_dlight+=numlights[2]/2;
		gl_RenderState.EnableLight(true);
		gl_RenderState.SetLights(numlights, &lightdata.arrays[0][0]);
	}
}

void GLWall::SetupLights()
{
	if (RenderStyle == STYLE_Add && !glset.lightadditivesurfaces) return;	// no lights on additively blended surfaces.

	// check for wall types which cannot have dynamic lights on them (portal types never get here so they don't need to be checked.)
	switch (type)
	{
	case RENDERWALL_FOGBOUNDARY:
	case RENDERWALL_MIRRORSURFACE:
	case RENDERWALL_COLOR:
		return;
	}

	float vtx[]={glseg.x1,zbottom[0],glseg.y1, glseg.x1,ztop[0],glseg.y1, glseg.x2,ztop[1],glseg.y2, glseg.x2,zbottom[1],glseg.y2};
	Plane p;

	lightdata.Clear();
	p.Set(&glseg);

	/*
	if (!p.ValidNormal()) 
	{
		return;
	}
	*/
	FLightNode *node;
	if (seg->sidedef == NULL)
	{
		node = NULL;
	}
	else if (!(seg->sidedef->Flags & WALLF_POLYOBJ))
	{
		node = seg->sidedef->lighthead;
	}
	else if (sub)
	{
		// Polobject segs cannot be checked per sidedef so use the subsector instead.
		node = sub->lighthead;
	}
	else node = NULL;

	// Iterate through all dynamic lights which touch this wall and render them
	while (node)
	{
		if (!(node->lightsource->flags2&MF2_DORMANT))
		{
			iter_dlight++;

			DVector3 posrel = node->lightsource->PosRelative(seg->frontsector);
			float x = posrel.X;
			float y = posrel.Y;
			float z = posrel.Z;
			float dist = fabsf(p.DistToPoint(x, z, y));
			float radius = node->lightsource->GetRadius();
			float scale = 1.0f / ((2.f * radius) - dist);
			FVector3 fn, pos;

			if (radius > 0.f && dist < radius)
			{
				FVector3 nearPt, up, right;

				pos = { x, z, y };
				fn = p.Normal();

				fn.GetRightUp(right, up);

				FVector3 tmpVec = fn * dist;
				nearPt = pos + tmpVec;

				FVector3 t1;
				int outcnt[4]={0,0,0,0};
				texcoord tcs[4];

				// do a quick check whether the light touches this polygon
				for(int i=0;i<4;i++)
				{
					t1 = FVector3(&vtx[i*3]);
					FVector3 nearToVert = t1 - nearPt;
					tcs[i].u = ((nearToVert | right) * scale) + 0.5f;
					tcs[i].v = ((nearToVert | up) * scale) + 0.5f;

					if (tcs[i].u<0) outcnt[0]++;
					if (tcs[i].u>1) outcnt[1]++;
					if (tcs[i].v<0) outcnt[2]++;
					if (tcs[i].v>1) outcnt[3]++;

				}
				if (outcnt[0]!=4 && outcnt[1]!=4 && outcnt[2]!=4 && outcnt[3]!=4) 
				{
					gl_GetLight(seg->frontsector->PortalGroup, p, node->lightsource, true, lightdata);
				}
			}
		}
		node = node->nextLight;
	}

	dynlightindex = GLRenderer->mLights->UploadLights(lightdata);
}