Wobbl/voxel_engine
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

Chapter completed: Packed Data

Browse source
This commit is contained in:
The Wobbler 2023-10-19 16:13:27 +02:00
parent b1edaf6fc1
commit 80ff13d702
3 changed files with 83 additions and 39 deletions
Download patch file Download diff file Expand all files Collapse all files

38
shaders/chunk.vert
View file

@ -1,10 +1,12 @@
#version 330 core
layout (location = 0) in ivec3 in_position;
layout (location = 1) in int voxel_id;
layout (location = 2) in int face_id;
layout (location = 3) in int ao_id;
layout (location = 4) in int flip_id;
layout (location = 0) in uint packed_data;
int x, y, z;
int voxel_id;
int face_id;
int ao_id;
int flip_id;
uniform mat4 m_proj;
uniform mat4 m_view;
@ -42,8 +44,34 @@ vec3 hash31(float p) {
}
void unpack(uint packed_data) {
// a, b, c, d, e, f, g = x, y, z, voxel_id, face_id, ao_id, flip_id
uint b_bit = 6u, c_bit = 6u, d_bit = 8u, e_bit = 3u, f_bit = 2u, g_bit = 1u;
uint b_mask = 63u, c_mask = 63u, d_mask = 255u, e_mask = 7u, f_mask = 3u, g_mask = 1u;
uint fg_bit = f_bit + g_bit;
uint efg_bit = e_bit + fg_bit;
uint defg_bit = d_bit + efg_bit;
uint cdefg_bit = c_bit + defg_bit;
uint bcdefg_bit = b_bit + cdefg_bit;
x = int(packed_data >> bcdefg_bit);
y = int((packed_data >> cdefg_bit) & b_mask);
z = int((packed_data >> defg_bit) & c_mask);
voxel_id = int((packed_data >> efg_bit) & d_mask);
face_id = int((packed_data >> fg_bit) & e_mask);
ao_id = int((packed_data >> g_bit) & f_mask);
flip_id = int(packed_data & g_mask);
}
void main() {
unpack(packed_data);
vec3 in_position = vec3(x, y, z);
int uv_index = gl_VertexID % 6 + ((face_id & 1) + flip_id * 2) * 6;
uv = uv_coords[uv_indices[uv_index]];
voxel_color = hash31(voxel_id);
shading = face_shading[face_id] * ao_values[ao_id];