OrdinaryMagician/vkdoom_m
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Add portal plane clipping

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This commit is contained in:
Magnus Norddahl 2016-11-26 09:01:58 +01:00
commit 8bbb63e913
6 changed files with 39 additions and 8 deletions
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12
src/r_poly_cull.cpp
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@ -28,11 +28,12 @@
#include "r_poly_cull.h"
#include "r_poly.h"
void PolyCull::CullScene(const TriMatrix &worldToClip)
void PolyCull::CullScene(const TriMatrix &worldToClip, const Vec4f &portalClipPlane)
{
ClearSolidSegments();
PvsSectors.clear();
frustumPlanes = FrustumPlanes(worldToClip);
PortalClipPlane = portalClipPlane;
// Cull front to back
MaxCeilingHeight = 0.0;
@ -174,6 +175,11 @@ bool PolyCull::CheckBBox(float *bspcoord)
if (result == IntersectionTest::outside)
return false;
// Skip if its in front of the portal:
if (PortalClipPlane != Vec4f(0.0f) && IntersectionTest::plane_aabb(PortalClipPlane, aabb) == IntersectionTest::outside)
return false;
// Occlusion test using solid segments:
static const int lines[4][4] =
@ -219,6 +225,10 @@ bool PolyCull::GetSegmentRangeForLine(double x1, double y1, double x2, double y2
{
double znear = 5.0;
// Cull if entirely behind the portal clip plane (tbd: should we clip the segment?)
if (Vec4f::dot(PortalClipPlane, Vec4f((float)x1, (float)y1, 0.0f, 1.0f)) < 0.0f && Vec4f::dot(PortalClipPlane, Vec4f((float)x2, (float)y2, 0.0f, 1.0f)) < 0.0f)
return false;
// Transform to 2D view space:
x1 = x1 - ViewPos.X;
y1 = y1 - ViewPos.Y;