diff options
Diffstat (limited to 'client/shaders/object_shader/opengl_vertex.glsl')
| -rw-r--r-- | client/shaders/object_shader/opengl_vertex.glsl | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/client/shaders/object_shader/opengl_vertex.glsl b/client/shaders/object_shader/opengl_vertex.glsl index 9ca5ef0f3..12078f532 100644 --- a/client/shaders/object_shader/opengl_vertex.glsl +++ b/client/shaders/object_shader/opengl_vertex.glsl @@ -36,6 +36,8 @@ 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; #ifdef ENABLE_DYNAMIC_SHADOWS // custom smoothstep implementation because it's not defined in glsl1.2 @@ -104,8 +106,15 @@ void main(void) #ifdef ENABLE_DYNAMIC_SHADOWS vec3 nNormal = normalize(vNormal); cosLight = dot(nNormal, -v_LightDirection); - float texelSize = 767.0 / f_textureresolution; - float slopeScale = clamp(1.0 - abs(cosLight), 0.0, 1.0); + + // Calculate normal offset scale based on the texel size adjusted for + // curvature of the SM texture. This code must be change together with + // getPerspectiveFactor or any light-space transformation. + float distanceToPlayer = length((eyePosition - worldPosition).xyz) / f_shadowfar; + float perspectiveFactor = distanceToPlayer * bias0 + bias1; + float texelSize = 1.0 / f_textureresolution; + texelSize *= f_shadowfar * perspectiveFactor / (bias1 / perspectiveFactor - texelSize * bias0) * 0.15; + float slopeScale = clamp(pow(1.0 - cosLight*cosLight, 0.5), 0.0, 1.0); normalOffsetScale = texelSize * slopeScale; if (f_timeofday < 0.2) { |