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author | x2048 <codeforsmile@gmail.com> | 2022-03-31 22:40:06 +0200 |
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committer | GitHub <noreply@github.com> | 2022-03-31 22:40:06 +0200 |
commit | 31578303a4eab6b6b083e57b6bf8d12ff3b3d991 (patch) | |
tree | 3ff56df6e29207c1ca3f2f93c5327f1cc786a7ec /client | |
parent | 06d197cdd042392e1551e5e7244c61300a6bb4e3 (diff) | |
download | minetest-31578303a4eab6b6b083e57b6bf8d12ff3b3d991.tar.gz minetest-31578303a4eab6b6b083e57b6bf8d12ff3b3d991.tar.bz2 minetest-31578303a4eab6b6b083e57b6bf8d12ff3b3d991.zip |
Tune shadow perspective distortion (#12146)
* Pass perspective distortion parameters as uniforms
* Set all perspective bias parameters via ShadowRenderer
* Recalibrate perspective distortion and shadow range to render less shadow geometry with the same quality and observed shadow distance
Diffstat (limited to 'client')
-rw-r--r-- | client/shaders/nodes_shader/opengl_fragment.glsl | 18 | ||||
-rw-r--r-- | client/shaders/nodes_shader/opengl_vertex.glsl | 8 | ||||
-rw-r--r-- | client/shaders/object_shader/opengl_fragment.glsl | 18 | ||||
-rw-r--r-- | client/shaders/object_shader/opengl_vertex.glsl | 8 | ||||
-rw-r--r-- | client/shaders/shadow_shaders/pass1_trans_vertex.glsl | 10 | ||||
-rw-r--r-- | client/shaders/shadow_shaders/pass1_vertex.glsl | 10 |
6 files changed, 36 insertions, 36 deletions
diff --git a/client/shaders/nodes_shader/opengl_fragment.glsl b/client/shaders/nodes_shader/opengl_fragment.glsl index adc8adccb..3dc66bdb3 100644 --- a/client/shaders/nodes_shader/opengl_fragment.glsl +++ b/client/shaders/nodes_shader/opengl_fragment.glsl @@ -47,17 +47,17 @@ const float fogShadingParameter = 1.0 / ( 1.0 - fogStart); #ifdef ENABLE_DYNAMIC_SHADOWS -const float bias0 = 0.9; -const float zPersFactor = 0.5; -const float bias1 = 1.0 - bias0 + 1e-6; +uniform float xyPerspectiveBias0; +uniform float xyPerspectiveBias1; +uniform float zPerspectiveBias; vec4 getPerspectiveFactor(in vec4 shadowPosition) { float pDistance = length(shadowPosition.xy); - float pFactor = pDistance * bias0 + bias1; + float pFactor = pDistance * xyPerspectiveBias0 + xyPerspectiveBias1; - shadowPosition.xyz *= vec3(vec2(1.0 / pFactor), zPersFactor); + shadowPosition.xyz *= vec3(vec2(1.0 / pFactor), zPerspectiveBias); return shadowPosition; } @@ -172,12 +172,12 @@ float getHardShadowDepth(sampler2D shadowsampler, vec2 smTexCoord, float realDis float getBaseLength(vec2 smTexCoord) { float l = length(2.0 * smTexCoord.xy - 1.0); // length in texture coords - return bias1 / (1.0 / l - bias0); // return to undistorted coords + return xyPerspectiveBias1 / (1.0 / l - xyPerspectiveBias0); // return to undistorted coords } float getDeltaPerspectiveFactor(float l) { - return 0.1 / (bias0 * l + bias1); // original distortion factor, divided by 10 + return 0.1 / (xyPerspectiveBias0 * l + xyPerspectiveBias1); // original distortion factor, divided by 10 } float getPenumbraRadius(sampler2D shadowsampler, vec2 smTexCoord, float realDistance, float multiplier) @@ -489,8 +489,8 @@ void main(void) vec3 shadow_color = vec3(0.0, 0.0, 0.0); vec3 posLightSpace = getLightSpacePosition(); - float distance_rate = (1 - pow(clamp(2.0 * length(posLightSpace.xy - 0.5),0.0,1.0), 20.0)); - float f_adj_shadow_strength = max(adj_shadow_strength-mtsmoothstep(0.9,1.1, posLightSpace.z ),0.0); + float distance_rate = (1 - pow(clamp(2.0 * length(posLightSpace.xy - 0.5),0.0,1.0), 50.0)); + float f_adj_shadow_strength = max(adj_shadow_strength-mtsmoothstep(0.9,1.1, posLightSpace.z),0.0); if (distance_rate > 1e-7) { diff --git a/client/shaders/nodes_shader/opengl_vertex.glsl b/client/shaders/nodes_shader/opengl_vertex.glsl index 5e77ac719..935fbf043 100644 --- a/client/shaders/nodes_shader/opengl_vertex.glsl +++ b/client/shaders/nodes_shader/opengl_vertex.glsl @@ -45,8 +45,8 @@ varying float nightRatio; const vec3 artificialLight = vec3(1.04, 1.04, 1.04); const float e = 2.718281828459; const float BS = 10.0; -const float bias0 = 0.9; -const float bias1 = 1.0 - bias0; +uniform float xyPerspectiveBias0; +uniform float xyPerspectiveBias1; #ifdef ENABLE_DYNAMIC_SHADOWS // custom smoothstep implementation because it's not defined in glsl1.2 @@ -206,9 +206,9 @@ void main(void) // Distance from the vertex to the player float distanceToPlayer = length(eyeToVertex - v_LightDirection * dot(eyeToVertex, v_LightDirection)) / f_shadowfar; // perspective factor estimation according to the - float perspectiveFactor = distanceToPlayer * bias0 + bias1; + float perspectiveFactor = distanceToPlayer * xyPerspectiveBias0 + xyPerspectiveBias1; float texelSize = f_shadowfar * perspectiveFactor * perspectiveFactor / - (f_textureresolution * bias1 - perspectiveFactor * bias0); + (f_textureresolution * xyPerspectiveBias1 - perspectiveFactor * xyPerspectiveBias0); float slopeScale = clamp(pow(1.0 - cosLight*cosLight, 0.5), 0.0, 1.0); normalOffsetScale = texelSize * slopeScale; diff --git a/client/shaders/object_shader/opengl_fragment.glsl b/client/shaders/object_shader/opengl_fragment.glsl index edb9d2bb1..2b9a59cd7 100644 --- a/client/shaders/object_shader/opengl_fragment.glsl +++ b/client/shaders/object_shader/opengl_fragment.glsl @@ -43,17 +43,17 @@ const float fogShadingParameter = 1.0 / (1.0 - fogStart); #endif #ifdef ENABLE_DYNAMIC_SHADOWS -const float bias0 = 0.9; -const float zPersFactor = 0.5; -const float bias1 = 1.0 - bias0 + 1e-6; +uniform float xyPerspectiveBias0; +uniform float xyPerspectiveBias1; +uniform float zPerspectiveBias; vec4 getPerspectiveFactor(in vec4 shadowPosition) { float pDistance = length(shadowPosition.xy); - float pFactor = pDistance * bias0 + bias1; + float pFactor = pDistance * xyPerspectiveBias0 + xyPerspectiveBias1; - shadowPosition.xyz *= vec3(vec2(1.0 / pFactor), zPersFactor); + shadowPosition.xyz *= vec3(vec2(1.0 / pFactor), zPerspectiveBias); return shadowPosition; } @@ -162,12 +162,12 @@ float getHardShadowDepth(sampler2D shadowsampler, vec2 smTexCoord, float realDis float getBaseLength(vec2 smTexCoord) { float l = length(2.0 * smTexCoord.xy - 1.0); // length in texture coords - return bias1 / (1.0 / l - bias0); // return to undistorted coords + return xyPerspectiveBias1 / (1.0 / l - xyPerspectiveBias0); // return to undistorted coords } float getDeltaPerspectiveFactor(float l) { - return 0.1 / (bias0 * l + bias1); // original distortion factor, divided by 10 + return 0.1 / (xyPerspectiveBias0 * l + xyPerspectiveBias1); // original distortion factor, divided by 10 } float getPenumbraRadius(sampler2D shadowsampler, vec2 smTexCoord, float realDistance, float multiplier) @@ -477,8 +477,8 @@ void main(void) vec3 shadow_color = vec3(0.0, 0.0, 0.0); vec3 posLightSpace = getLightSpacePosition(); - float distance_rate = (1 - pow(clamp(2.0 * length(posLightSpace.xy - 0.5),0.0,1.0), 20.0)); - float f_adj_shadow_strength = max(adj_shadow_strength-mtsmoothstep(0.9,1.1, posLightSpace.z ),0.0); + float distance_rate = (1 - pow(clamp(2.0 * length(posLightSpace.xy - 0.5),0.0,1.0), 50.0)); + float f_adj_shadow_strength = max(adj_shadow_strength-mtsmoothstep(0.9,1.1, posLightSpace.z),0.0); if (distance_rate > 1e-7) { diff --git a/client/shaders/object_shader/opengl_vertex.glsl b/client/shaders/object_shader/opengl_vertex.glsl index ff0067302..55861b0e9 100644 --- a/client/shaders/object_shader/opengl_vertex.glsl +++ b/client/shaders/object_shader/opengl_vertex.glsl @@ -37,8 +37,8 @@ const vec3 artificialLight = vec3(1.04, 1.04, 1.04); varying float vIDiff; const float e = 2.718281828459; const float BS = 10.0; -const float bias0 = 0.9; -const float bias1 = 1.0 - bias0; +uniform float xyPerspectiveBias0; +uniform float xyPerspectiveBias1; #ifdef ENABLE_DYNAMIC_SHADOWS // custom smoothstep implementation because it's not defined in glsl1.2 @@ -116,9 +116,9 @@ void main(void) // Distance from the vertex to the player float distanceToPlayer = length(eyeToVertex - v_LightDirection * dot(eyeToVertex, v_LightDirection)) / f_shadowfar; // perspective factor estimation according to the - float perspectiveFactor = distanceToPlayer * bias0 + bias1; + float perspectiveFactor = distanceToPlayer * xyPerspectiveBias0 + xyPerspectiveBias1; float texelSize = f_shadowfar * perspectiveFactor * perspectiveFactor / - (f_textureresolution * bias1 - perspectiveFactor * bias0); + (f_textureresolution * xyPerspectiveBias1 - perspectiveFactor * xyPerspectiveBias0); float slopeScale = clamp(pow(1.0 - cosLight*cosLight, 0.5), 0.0, 1.0); normalOffsetScale = texelSize * slopeScale; diff --git a/client/shaders/shadow_shaders/pass1_trans_vertex.glsl b/client/shaders/shadow_shaders/pass1_trans_vertex.glsl index 0a9efe450..6d2877d18 100644 --- a/client/shaders/shadow_shaders/pass1_trans_vertex.glsl +++ b/client/shaders/shadow_shaders/pass1_trans_vertex.glsl @@ -4,15 +4,15 @@ varying vec4 tPos; varying vec3 varColor; #endif -const float bias0 = 0.9; -const float zPersFactor = 0.5; -const float bias1 = 1.0 - bias0 + 1e-6; +uniform float xyPerspectiveBias0; +uniform float xyPerspectiveBias1; +uniform float zPerspectiveBias; vec4 getPerspectiveFactor(in vec4 shadowPosition) { float pDistance = length(shadowPosition.xy); - float pFactor = pDistance * bias0 + bias1; - shadowPosition.xyz *= vec3(vec2(1.0 / pFactor), zPersFactor); + float pFactor = pDistance * xyPerspectiveBias0 + xyPerspectiveBias1; + shadowPosition.xyz *= vec3(vec2(1.0 / pFactor), zPerspectiveBias); return shadowPosition; } diff --git a/client/shaders/shadow_shaders/pass1_vertex.glsl b/client/shaders/shadow_shaders/pass1_vertex.glsl index feee9467f..3873ac6e6 100644 --- a/client/shaders/shadow_shaders/pass1_vertex.glsl +++ b/client/shaders/shadow_shaders/pass1_vertex.glsl @@ -1,15 +1,15 @@ uniform mat4 LightMVP; // world matrix varying vec4 tPos; -const float bias0 = 0.9; -const float zPersFactor = 0.5; -const float bias1 = 1.0 - bias0 + 1e-6; +uniform float xyPerspectiveBias0; +uniform float xyPerspectiveBias1; +uniform float zPerspectiveBias; vec4 getPerspectiveFactor(in vec4 shadowPosition) { float pDistance = length(shadowPosition.xy); - float pFactor = pDistance * bias0 + bias1; - shadowPosition.xyz *= vec3(vec2(1.0 / pFactor), zPersFactor); + float pFactor = pDistance * xyPerspectiveBias0 + xyPerspectiveBias1; + shadowPosition.xyz *= vec3(vec2(1.0 / pFactor), zPerspectiveBias); return shadowPosition; } |