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View culling is stupid

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Dynamitos
2024-10-22 13:31:58 +02:00
parent bbb774d9df
commit 72e60cfe30
11 changed files with 118 additions and 76 deletions
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res/shaders/terrain/update_utils.slang
+7 -5
View File
@@ -2,6 +2,7 @@ import Common;
import Bisector;
import CBT;
import Parameters;
import Bounding;
// Needs to be defined before including update_utilities
struct BisectorGeometry
@@ -43,10 +44,10 @@ bool FrustumAABBIntersect(in Frustum frustum, float3 aabbMin, float3 aabbMax)
int ClassifyBisector(in BisectorGeometry tri, uint depth)
{
// Check the triangle's visibility
float3 triNormal = normalize(cross(tri.p[2] - tri.p[1], tri.p[0] - tri.p[1]));
float3 triNormal = normalize(cross(tri.p[2] - tri.p[0], tri.p[1] - tri.p[0]));
float3 triCenter = (tri.p[0] + tri.p[1] + tri.p[2]) / 3.0;
float3 viewDir = normalize(-triCenter);
float FdotV = dot(viewDir, pViewParams.cameraForward_WS.xyz);
float FdotV = dot(viewDir, -pViewParams.cameraForward_WS.xyz);
float VdotN = dot(viewDir, triNormal);
// Here we don't use 0 as it introduces stability issues at grazing angles
@@ -54,11 +55,12 @@ int ClassifyBisector(in BisectorGeometry tri, uint depth)
return BACK_FACE_CULLED;
// Compute the triangle's AABB
float3 aabbMin = float3(min(min(tri.p[0].x, tri.p[1].x), tri.p[2].x), min(min(tri.p[0].y, tri.p[1].y), tri.p[2].y), min(min(tri.p[0].z, tri.p[1].z), tri.p[2].z));
float3 aabbMax = float3(max(max(tri.p[0].x, tri.p[1].x), tri.p[2].x), max(max(tri.p[0].y, tri.p[1].y), tri.p[2].y), max(max(tri.p[0].z, tri.p[1].z), tri.p[2].z));
AABB aabb;
aabb.minCorner = float3(min(min(tri.p[0].x, tri.p[1].x), tri.p[2].x), min(min(tri.p[0].y, tri.p[1].y), tri.p[2].y), min(min(tri.p[0].z, tri.p[1].z), tri.p[2].z));
aabb.maxCorner = float3(max(max(tri.p[0].x, tri.p[1].x), tri.p[2].x), max(max(tri.p[0].y, tri.p[1].y), tri.p[2].y), max(max(tri.p[0].z, tri.p[1].z), tri.p[2].z));
// First we do a frustum culling pass
if (!FrustumAABBIntersect(pViewParams.viewFrustum, aabbMin, aabbMax))
if (!FrustumAABBIntersect(pViewParams.viewFrustum, aabb.minCorner, aabb.maxCorner))
return FRUSTUM_CULLED;
// Project the points on screen