From 861616bf693b78b070ada6cbc6aa79eb807fdde8 Mon Sep 17 00:00:00 2001 From: Jack Andersen Date: Sun, 13 Mar 2016 02:00:12 +0100 Subject: Full Inverse-Quadratic-Equation Lamp Falloff MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This patch adds a new `falloff_type` ('Inverse Coefficients') for Lamps in Blender-Internal and GLSL. The current falloff modes use a formula like this inverse-square one: `I = E × (D^2 / (D^2 + Q × r^2))` While such a formula is simple for 3D-artists to use, it's algebraically cumbersome to work with. Game-designers authoring their own shaders could benefit much more by having direct control of falloff-coefficients: `I = E × (1.0 / (coefC + coefL × r + coefQ × r^2))` In this mode, the `distance` parameter is unused (except for 'Sphere' mode); instead relying on the designer to mathematically-model the falloff-behavior. The UI has been patched like so: {F153843} Reviewers: brecht, psy-fi Reviewed By: psy-fi Subscribers: brita_, antidote, campbellbarton, psy-fi Differential Revision: https://developer.blender.org/D1194 --- release/scripts/startup/bl_ui/properties_data_lamp.py | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'release') diff --git a/release/scripts/startup/bl_ui/properties_data_lamp.py b/release/scripts/startup/bl_ui/properties_data_lamp.py index 0121ad46c86..30cd39d2e2f 100644 --- a/release/scripts/startup/bl_ui/properties_data_lamp.py +++ b/release/scripts/startup/bl_ui/properties_data_lamp.py @@ -103,6 +103,13 @@ class DATA_PT_lamp(DataButtonsPanel, Panel): sub.prop(lamp, "linear_attenuation", slider=True, text="Linear") sub.prop(lamp, "quadratic_attenuation", slider=True, text="Quadratic") + elif lamp.falloff_type == 'INVERSE_COEFFICIENTS': + col.label(text="Inverse Coefficients:") + sub = col.column(align=True) + sub.prop(lamp, "constant_coefficient", text="Constant") + sub.prop(lamp, "linear_coefficient", text="Linear") + sub.prop(lamp, "quadratic_coefficient", text="Quadratic") + col.prop(lamp, "use_sphere") if lamp.type == 'AREA': -- cgit v1.2.3