diff options
| author | Omar El Sheikh <techmanozmar@gmail.com> | 2022-02-22 18:10:09 -0500 |
|---|---|---|
| committer | Omar El Sheikh <techmanozmar@gmail.com> | 2022-08-13 08:09:32 -0700 |
| commit | 78881b3cc3a389c21c1417ad05840e80a234e2d7 (patch) | |
| tree | e5b11b00aee94987c1ce7415bafeff01d33b2a25 /servers/rendering/renderer_rd/shaders | |
| parent | f2a61684143af02a8cbe7002645af817607f9bd6 (diff) | |
Octahedral Normal/Tangent Compression
Implementation of Octahedral normal compression into Godot 4.0
Diffstat (limited to 'servers/rendering/renderer_rd/shaders')
| -rw-r--r-- | servers/rendering/renderer_rd/shaders/scene_forward_clustered.glsl | 18 | ||||
| -rw-r--r-- | servers/rendering/renderer_rd/shaders/scene_forward_mobile.glsl | 18 |
2 files changed, 26 insertions, 10 deletions
diff --git a/servers/rendering/renderer_rd/shaders/scene_forward_clustered.glsl b/servers/rendering/renderer_rd/shaders/scene_forward_clustered.glsl index e9515c7670..6b4e4a5a16 100644 --- a/servers/rendering/renderer_rd/shaders/scene_forward_clustered.glsl +++ b/servers/rendering/renderer_rd/shaders/scene_forward_clustered.glsl @@ -15,11 +15,11 @@ layout(location = 0) in vec3 vertex_attrib; //only for pure render depth when normal is not used #ifdef NORMAL_USED -layout(location = 1) in vec3 normal_attrib; +layout(location = 1) in vec2 normal_attrib; #endif #if defined(TANGENT_USED) || defined(NORMAL_MAP_USED) || defined(LIGHT_ANISOTROPY_USED) -layout(location = 2) in vec4 tangent_attrib; +layout(location = 2) in vec2 tangent_attrib; #endif #if defined(COLOR_USED) @@ -58,6 +58,13 @@ layout(location = 10) in uvec4 bone_attrib; layout(location = 11) in vec4 weight_attrib; #endif +vec3 oct_to_vec3(vec2 e) { + vec3 v = vec3(e.xy, 1.0 - abs(e.x) - abs(e.y)); + float t = max(-v.z, 0.0); + v.xy += t * -sign(v.xy); + return v; +} + /* Varyings */ layout(location = 0) out vec3 vertex_interp; @@ -231,12 +238,13 @@ void vertex_shader(in uint instance_index, in bool is_multimesh, in SceneData sc vec3 vertex = vertex_attrib; #ifdef NORMAL_USED - vec3 normal = normal_attrib * 2.0 - 1.0; + vec3 normal = oct_to_vec3(normal_attrib * 2.0 - 1.0); #endif #if defined(TANGENT_USED) || defined(NORMAL_MAP_USED) || defined(LIGHT_ANISOTROPY_USED) - vec3 tangent = tangent_attrib.xyz * 2.0 - 1.0; - float binormalf = tangent_attrib.a * 2.0 - 1.0; + vec2 signed_tangent_attrib = tangent_attrib * 2.0 - 1.0; + vec3 tangent = oct_to_vec3(vec2(signed_tangent_attrib.x, abs(signed_tangent_attrib.y) * 2.0 - 1.0)); + float binormalf = sign(signed_tangent_attrib.y); vec3 binormal = normalize(cross(normal, tangent) * binormalf); #endif diff --git a/servers/rendering/renderer_rd/shaders/scene_forward_mobile.glsl b/servers/rendering/renderer_rd/shaders/scene_forward_mobile.glsl index 6548793bee..0960533917 100644 --- a/servers/rendering/renderer_rd/shaders/scene_forward_mobile.glsl +++ b/servers/rendering/renderer_rd/shaders/scene_forward_mobile.glsl @@ -16,11 +16,11 @@ layout(location = 0) in vec3 vertex_attrib; //only for pure render depth when normal is not used #ifdef NORMAL_USED -layout(location = 1) in vec3 normal_attrib; +layout(location = 1) in vec2 normal_attrib; #endif #if defined(TANGENT_USED) || defined(NORMAL_MAP_USED) || defined(LIGHT_ANISOTROPY_USED) -layout(location = 2) in vec4 tangent_attrib; +layout(location = 2) in vec2 tangent_attrib; #endif #if defined(COLOR_USED) @@ -59,6 +59,13 @@ layout(location = 10) in uvec4 bone_attrib; layout(location = 11) in vec4 weight_attrib; #endif +vec3 oct_to_vec3(vec2 e) { + vec3 v = vec3(e.xy, 1.0 - abs(e.x) - abs(e.y)); + float t = max(-v.z, 0.0); + v.xy += t * -sign(v.xy); + return v; +} + /* Varyings */ layout(location = 0) highp out vec3 vertex_interp; @@ -229,12 +236,13 @@ void main() { vec3 vertex = vertex_attrib; #ifdef NORMAL_USED - vec3 normal = normal_attrib * 2.0 - 1.0; + vec3 normal = oct_to_vec3(normal_attrib * 2.0 - 1.0); #endif #if defined(TANGENT_USED) || defined(NORMAL_MAP_USED) || defined(LIGHT_ANISOTROPY_USED) - vec3 tangent = tangent_attrib.xyz * 2.0 - 1.0; - float binormalf = tangent_attrib.a * 2.0 - 1.0; + vec3 signed_tangent_attrib = tangent_attrib * 2.0 - 1.0; + vec3 tangent = oct_to_vec3(vec2(signed_tangent_attrib.x, abs(signed_tangent_attrib.y) * 2.0 - 1.0)); + float binormalf = sign(signed_tangent_attrib.y); vec3 binormal = normalize(cross(normal, tangent) * binormalf); #endif |