eu07/maszyna
17
0
Fork 0
mirror of https://github.com/MaSzyna-EU07/maszyna.git synced 2026-11-13 05:50:11 +01:00
Code Issues 139 Wiki Activity

Improve rain shader

Browse Source
This commit is contained in:
Hirek
2026-10-26 15:51:56 +01:00
parent a6bdeeaa2b
commit 719c729929
43 changed files with 5620 additions and 355 deletions
Download Patch File Download Diff File Expand all files Collapse all files

52
shaders/ogl46/water_grid.comp Normal file
View File

@@ -0,0 +1,52 @@
#version 460 core
#define STAGE_COMPUTE 1
// the water on the windscreens (water_sim.glsl): every drop put in the cells of the grid it reaches into, as far as the glasses
// draw it (a sliding one is drawn out behind itself) and as far as the drops it may flow together with are. a thread per drop,
// a row of groups per glass
#include "common.glsl"
#include "water_sim.glsl"
layout(local_size_x = WATER_GROUP_SIZE) in;
void main()
{
uint slot = gl_WorkGroupID.y;
uint place = gl_GlobalInvocationID.x;
if ((water_slots[slot].z < 0.5) || (place >= uint(WATER_DROPS)))
return;
water_drop_s drop = water_drops[slot * uint(WATER_DROPS) + place];
if (drop.place.z <= 0.0)
return;
water_frame_s frame = water_frame(slot, drop.place.xy);
float lu = length(frame.tu);
float lv = length(frame.tv);
if ((lu < 1e-6) || (lv < 1e-6))
return;
float reach;
if (drop.motion.w < 1.0)
{
reach = 0.6 * water_flake(drop.place.z);
}
else
{
bool sliding = length(frame.tu * drop.motion.x + frame.tv * drop.motion.y) > 0.002;
reach = water_radius(drop.place.z) * (sliding ? 3.6 : 2.2);
}
vec2 extent = vec2(reach / lu, reach / lv);
ivec2 lower = clamp(ivec2(floor((drop.place.xy - extent) * float(WATER_GRID))), ivec2(0), ivec2(WATER_GRID - 1));
ivec2 upper = clamp(ivec2(floor((drop.place.xy + extent) * float(WATER_GRID))), ivec2(0), ivec2(WATER_GRID - 1));
// a drop can't be larger than this many cells, it would only flood the lists
upper = min(upper, lower + ivec2(6));
uint base = water_grid_base(slot);
for (int y = lower.y; y <= upper.y; ++y)
{
for (int x = lower.x; x <= upper.x; ++x)
{
uint cell = uint(y * WATER_GRID + x);
uint count = atomicAdd(water_cells[base + cell], 1u);
if (count < uint(WATER_CELL_DROPS))
water_cells[base + uint(WATER_GRID * WATER_GRID) + cell * uint(WATER_CELL_DROPS) + count] = place;
}
}
}