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weird grass shader test

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Tuomas Katajisto 2025-09-20 23:50:51 +03:00
parent 726a43370e
commit 1e44d6ddc2
2 changed files with 91 additions and 127 deletions
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197
src/shaders/jai/shader_plane.jai
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@ -141,14 +141,9 @@ vs_plane_source_glsl430 := u8.[
}
else
{
vec2 _63 = vec2(float(int(pos.x * 50000.0)), float(int(pos.z * 50000.0)));
vec2 param = _63;
if (random(param) < (float(idx) * 0.100000001490116119384765625))
{
discard;
}
vec2 param_1 = _63;
frag_color = vec4(0.0, random(param_1) + 0.100000001490116119384765625, 0.0, 1.0);
vec2 _54 = pos.xy * 10.0;
vec2 param = _54;
frag_color = vec4(vec3(length(vec2((fract(_54.x) * 2.0) - 1.0, (fract(_54.y) * 2.0) - 1.0))) * 0.100000001490116119384765625, 1.0);
}
}
@ -199,28 +194,19 @@ fs_plane_source_glsl430 := u8.[
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];
/*
#version 300 es
@ -312,14 +298,9 @@ vs_plane_source_glsl300es := u8.[
}
else
{
highp vec2 _63 = vec2(float(int(pos.x * 50000.0)), float(int(pos.z * 50000.0)));
highp vec2 param = _63;
if (random(param) < (float(idx) * 0.100000001490116119384765625))
{
discard;
}
highp vec2 param_1 = _63;
frag_color = vec4(0.0, random(param_1) + 0.100000001490116119384765625, 0.0, 1.0);
highp vec2 _54 = pos.xy * 10.0;
highp vec2 param = _54;
frag_color = vec4(vec3(length(vec2((fract(_54.x) * 2.0) - 1.0, (fract(_54.y) * 2.0) - 1.0))) * 0.100000001490116119384765625, 1.0);
}
}
@ -377,29 +358,19 @@ fs_plane_source_glsl300es := u8.[
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];
/*
#include <metal_stdlib>
@ -519,7 +490,6 @@ vs_plane_source_metal_macos := u8.[
struct main0_in
{
float4 pos [[user(locn0)]];
int idx [[user(locn1)]];
};
static inline __attribute__((always_inline))
@ -537,14 +507,9 @@ vs_plane_source_metal_macos := u8.[
}
else
{
float2 _63 = float2(float(int(in.pos.x * 50000.0)), float(int(in.pos.z * 50000.0)));
float2 param = _63;
if (random(param) < (float(in.idx) * 0.100000001490116119384765625))
{
discard_fragment();
}
float2 param_1 = _63;
out.frag_color = float4(0.0, random(param_1) + 0.100000001490116119384765625, 0.0, 1.0);
float2 _54 = in.pos.xy * 10.0;
float2 param = _54;
out.frag_color = float4(float3(length(float2((fract(_54.x) * 2.0) - 1.0, (fract(_54.y) * 2.0) - 1.0))) * 0.100000001490116119384765625, 1.0);
}
return out;
}
@ -586,61 +551,49 @@ fs_plane_source_metal_macos := u8.[
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];
plane_shader_desc :: (backend: sg_backend) -> sg_shader_desc {
desc: sg_shader_desc;

21
src/shaders/shader_plane.glsl
View File

@ -49,15 +49,26 @@ layout(binding=1) uniform plane_world_config {
};
void main() {
if(planeType == 1) {
frag_color = vec4(0.0, 0.0, 1.0, 1.0);
} else {
vec2 approxPos = vec2(int(pos.x * 50000.0), int(pos.z * 50000.0));
float height = random(approxPos);
if(height < float(idx) * 0.1) {
discard;
float density = 10.0;
vec2 uv = pos.xy * density;
vec2 localUV = vec2(fract(uv.x) * 2.0 - 1.0, fract(uv.y) * 2.0 - 1.0);
float localDistanceFromCenter = length(localUV);
float rand = random(uv);
bool outsideThickness = localDistanceFromCenter > (0.1 * (rand - pos.y));
if(outsideThickness) {
// discard;
}
frag_color = vec4(0.0, random(approxPos) + 0.1, 0.0, 1.0);
frag_color = vec4(vec3(localDistanceFromCenter) * 0.1, 1.0);
}
}
@end