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This commit is contained in:
mcrcortex
2025-04-09 18:31:48 +10:00
parent c5cf08365f
commit 802cea001c
9 changed files with 56 additions and 112 deletions
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25
src/main/resources/assets/voxy/shaders/lod/hierarchical/screenspace.glsl
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@@ -24,12 +24,13 @@ vec2 size;
uint BASE_IDX = gl_LocalInvocationID.x*8;
shared vec2[LOCAL_SIZE*8] screenPoints;
UnpackedNode node22;
//Sets up screenspace with the given node id, returns true on success false on failure/should not continue
//Accesses data that is setup in the main traversal and is just shared to here
void setupScreenspace(in UnpackedNode node) {
//TODO: Need to do aabb size for the nodes, it must be an overesimate of all the children
node22 = node;
/*
Transform transform = transforms[getTransformIndex(node)];
@@ -59,12 +60,6 @@ void setupScreenspace(in UnpackedNode node) {
screenPoints[BASE_IDX+i] = point.xy*0.5f+0.5f;
}
//TODO: MORE ACCURATLY DETERMIN SCREENSPACE AREA, this can be done by computing and adding
// the projected surface area of each face/quad which winding order faces the camera
// (this is just the dot product of 2 projected vectors)
//can do a funny by not doing the perspective divide except on the output of the area
//printf("Screenspace MIN: %f, %f, %f MAX: %f, %f, %f", minBB.x,minBB.y,minBB.z, maxBB.x,maxBB.y,maxBB.z);
//Convert to screenspace
@@ -77,7 +72,7 @@ void setupScreenspace(in UnpackedNode node) {
//Checks if the node is implicitly culled (outside frustum)
bool outsideFrustum() {
return any(lessThanEqual(maxBB, vec3(0.0f))) || any(lessThanEqual(vec3(1.0f), minBB)) || maxBB.z < 0.5f;// maxBB.z > 1 is actually wrong
return any(lessThanEqual(maxBB, vec3(0.0f))) || any(lessThanEqual(vec3(1.0f), minBB));// maxBB.z > 1 is actually wrong
//|| any(lessThanEqual(minBB, vec3(0.0f, 0.0f, 0.0f))) || any(lessThanEqual(vec3(1.0f, 1.0f, 1.0f), maxBB));
}
@@ -87,20 +82,18 @@ bool isCulledByHiz() {
// return false;//Just cull it for now cause other culling isnt working, TODO: FIXME
//}
vec2 ssize = size * vec2(screenW, screenH);
float miplevel = ceil(log2(max(max(ssize.x, ssize.y),1)));
miplevel = clamp(miplevel, 1, 20);
miplevel = clamp(miplevel, 0, 20);
vec2 midpoint = (maxBB.xy + minBB.xy)*0.5f;
//TODO: maybe get rid of clamp
//Todo: replace with some rasterization, e.g. especially for request back to cpu
midpoint = clamp(midpoint, vec2(0), vec2(1));
bool culled = textureLod(hizDepthSampler, vec3(midpoint, minBB.z), miplevel) < 0.0001f;
if (culled) {
printf("HiZ sample point culled: (%f,%f)@%f against %f", midpoint.x, midpoint.y, miplevel, minBB.z);
vec2 midpoint2 = clamp(midpoint, vec2(0), vec2(1));
bool culled = textureLod(hizDepthSampler, vec3(midpoint2, minBB.z), miplevel) < 0.0001f;
//printf("HiZ sample point: (%f,%f)@%f against %f", midpoint.x, midpoint.y, miplevel, minBB.z);
if (culled && node22.lodLevel != 4) {
printf("HiZ sample point: (%f,%f)@%f against %f", midpoint.x, midpoint.y, miplevel, minBB.z);
}
return culled;
}