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EEVEE: Ambient Occlusion: Add sample parameter support for the AO node 

The actual sample count is rounded up to a multiple of 4 because we
sample 4 horizons directions.

Changing this setting forces the shader to recompile (because using a
GPU_constant).
This commit is contained in:
Clément Foucault 2021-03-08 17:19:06 +01:00
parent 1540f1df07
commit 30cb4326fe
2 changed files with 10 additions and 2 deletions
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3
source/blender/gpu/shaders/material/gpu_shader_material_ambient_occlusion.glsl
View File

@ -3,12 +3,13 @@ void node_ambient_occlusion(vec4 color,
float dist,
vec3 normal,
const float inverted,
const float sample_count,
out vec4 result_color,
out float result_ao)
{
vec3 bent_normal;
vec4 rand = texelfetch_noise_tex(gl_FragCoord.xy);
OcclusionData data = occlusion_search(viewPosition, maxzBuffer, dist, inverted, 8.0);
OcclusionData data = occlusion_search(viewPosition, maxzBuffer, dist, inverted, sample_count);
vec3 V = cameraVec(worldPosition);
vec3 N = normalize(normal);

9
source/blender/nodes/shader/nodes/node_shader_ambient_occlusion.c
View File

@ -47,8 +47,15 @@ static int node_shader_gpu_ambient_occlusion(GPUMaterial *mat,
GPU_material_flag_set(mat, GPU_MATFLAG_DIFFUSE);
float inverted = node->custom2 ? 1.0f : 0.0f;
float f_samples = divide_ceil_u(node->custom1, 4);
return GPU_stack_link(mat, node, "node_ambient_occlusion", in, out, GPU_constant(&inverted));
return GPU_stack_link(mat,
node,
"node_ambient_occlusion",
in,
out,
GPU_constant(&inverted),
GPU_constant(&f_samples));
}
static void node_shader_init_ambient_occlusion(bNodeTree *UNUSED(ntree), bNode *node)