start adding mitsuba area lights and materials

ExampleScenes/Flythrough/rtbFlythroughMexximpRemodeler.m

+function [scene, mappings] = rtbFlythroughMexximpRemodeler(scene, mappings, names, conditionValues, conditionNumber)
+%% Remodel the mexximp scene based on conditions values.
+
+% build a lookat for the camera
+cameraPosition = rtbGetNamedNumericValue(names, conditionValues, 'cameraPosition', []);
+cameraTarget = rtbGetNamedNumericValue(names, conditionValues, 'cameraTarget', []);
+cameraUp = rtbGetNamedNumericValue(names, conditionValues, 'cameraUp', []);
+cameraTransform = mexximpLookAt(cameraPosition, cameraTarget, cameraUp);
+
+% build a lookat for the falcon
+falconPosition = rtbGetNamedNumericValue(names, conditionValues, 'falconPosition', []);
+falconTarget = rtbGetNamedNumericValue(names, conditionValues, 'falconTarget', []);
+falconUp = rtbGetNamedNumericValue(names, conditionValues, 'falconUp', []);
+falconTransform = mexximpLookAt(falconPosition, falconTarget, falconUp);
+
+% find the camera node
+cameraNodeSelector = strcmp({scene.rootNode.children.name}, 'Camera');
+scene.rootNode.children(cameraNodeSelector).transformation = cameraTransform;
+
+% find falcon nodes
+for nn = 1:numel(scene.rootNode.children)
+    if strncmp('falcon', scene.rootNode.children(nn).name, 6)
+        scene.rootNode.children(nn).transformation = ...
+            scene.rootNode.children(nn).transformation * falconTransform;
+    end
+end
+
+% for fun, preview each condition in matlab
+mexximpScenePreview(scene);
+drawnow();

ExampleScenes/Flythrough/rtbFlythroughMitsubaRemodeler.m

+function nativeScene = rtbFlythroughMitsubaRemodeler(parentScene, nativeScene, mappings, names, conditionValues, conditionNumber)
+%% Remodel the mexximp scene based on conditions values.
+
+%% Light up the falcon engines.
+% the engine is made from several separate mesh shapes
+% find them by all by matching the name "falcong_r_body"
+% which I found by clicking around the preview figure
+
+engineShapeName = 'falcong_r_body';
+engineSpectrum = '300:5 800:0';
+nNested = numel(nativeScene.nested);
+for nn = 1:nNested
+    element = nativeScene.nested{nn};
+    
+    if ~strcmp(element.type, 'shape')
+        continue;
+    end
+    
+    if isempty(strfind(element.id, engineShapeName))
+        continue;
+    end
+    
+    rtbMMitsubaBlessAsAreaLight(element, 'radiance', engineSpectrum);
+end
+
+%% Light up a red strip light around the club.
+% the strip light is made from several separate mesh shapes
+% find them by each by matching their names
+% which I found by clicking around the preview figure
+% many shapes have similar names, which we want to ignore
+
+stripShapeNames = {'Box09_', 'Box10_', 'Box11_', 'Box12_'};
+stripSpectrum = '300:0 500:0 650:1 800:1';
+nNested = numel(nativeScene.nested);
+for nn = 1:nNested
+    element = nativeScene.nested{nn};
+    
+    if ~strcmp(element.type, 'shape')
+        continue;
+    end
+    
+    for ss = 1:numel(stripShapeNames)
+        shapeName = stripShapeNames{ss};
+        if ~isempty(strfind(element.id, shapeName))
+            rtbMMitsubaBlessAsAreaLight(element, 'radiance', stripSpectrum);
+            break;
+        end
+    end
+end
+
+%% Configure Various Materials.
+% most material names in these free scene files are uninformative:
+%   wire_213154229, wire_008008136, 03___Default, etc.
+% make some best guesses based on their names and presence of textures
+% but generally just choose some arbitrary, fun Mitusba materials
+
+nNested = numel(nativeScene.nested);
+for nn = 1:nNested
+    element = nativeScene.nested{nn};
+    elementId = lower(element.id);
+    
+    if ~strcmp(element.type, 'bsdf')
+        continue;
+    end
+    
+    texture = element.find('', 'type', 'texture');
+    if isempty(texture)
+        
+        if ~isempty(strfind(elementId, 'wire'))
+            
+            % make "wire" be rough plastic parts of the night club
+            element.pluginType = 'roughplastic';
+            
+            % rename reflectance to be diffuse reflectance, specifically
+            element.find('reflectance').id = 'diffuseReflectance';
+            
+            % choose arbitrary specular reflectance
+            element.setProperty('specularReflectance', 'spectrum', 0.5);
+            
+        elseif ~isempty(strfind(elementId, 'glass')) ...
+                || ~isempty(strfind(elementId, 'solar_panals')) ...
+                ||~isempty(strfind(elementId, 'lights'))
+            
+            % make "glass", "solar panals" (sic), and "lights" be smooth glass
+            element.pluginType = 'dielectric';
+            
+        else
+            % make default, including the name "default", be rough metal
+            element.pluginType = 'roughconductor';
+            element.setProperty('alpha', 'float', 0.4);
+            element.setProperty('material', 'string', 'Ir');
+        end
+        
+    else
+        
+        % make all textured materials be rough plastic
+        element.pluginType = 'roughplastic';
+        texture.id = 'diffuseReflectance';
+        element.setProperty('specularReflectance', 'spectrum', 0.2);
+        element.setProperty('alpha', 'float', 0.5);
+        
+    end
+end
\ No newline at end of file

ExampleScenes/Flythrough/rtbMakeFlythrough.m

@@ -5,12 +5,8 @@
 %% Fly the Millenium Falcon through a night club.
 
 % TODO:
-%   mitsuba scene remodeler
-%   special "bless" operation utils
-%   falcon engine light
-%   club wall red neon strip light
-%   club fog
 %   various fun materials
+%   club fog
 %   path tracer?
 
 %% Choose example files.
@@ -18,12 +14,16 @@ clear;
 nightClubFile = fullfile(rtbRoot(), 'ExampleScenes', 'Flythrough', 'NightClub', 'stonetee.obj');
 milleniumFalconFile = fullfile(rtbRoot(), 'ExampleScenes', 'Flythrough', 'MilleniumFalcon', 'millenium-falcon.obj');
 
+
 %% Build a combined scene with lights and camera.
 nightClub = mexximpCleanImport(nightClubFile);
 falcon = mexximpCleanImport(milleniumFalconFile);
 falcon = mexximpVisitStructFields(falcon, @rtbResourcePath, ...
     'filterFunction', @RtbAssimpStrategy.mightBeFile, ...
-    'visitArgs', {'resourceFolder', fullfile(rtbRoot(), 'ExampleScenes', 'Flythrough', 'MilleniumFalcon'), 'toReplace', ''});
+    'visitArgs', { ...
+    'resourceFolder', fullfile(rtbRoot(), 'ExampleScenes', 'Flythrough', 'MilleniumFalcon'), ...
+    'toReplace', '', ...
+    'writeFullPaths', false});
 
 falconSize = 50;
 insertTransform = mexximpScale(falconSize * [1 1 1]);
@@ -34,9 +34,12 @@ scene = mexximpCentralizeCamera(scene, 'viewExterior', false);
 scene = mexximpAddLanterns(scene);
 [sceneBox, middlePoint] = mexximpSceneBox(scene);
 
+
 %% Choose batch renderer options.
-hints.imageWidth = 640;
-hints.imageHeight = 480;
+hints.whichConditions = 5;
+
+hints.imageWidth = 320;
+hints.imageHeight = 240;
 hints.fov = deg2rad(60);
 hints.recipeName = 'rtbMakeFlythrough';
 
@@ -45,6 +48,7 @@ hints.batchRenderStrategy = RtbAssimpStrategy(hints);
 hints.batchRenderStrategy.remodelPerConditionAfterFunction = @rtbFlythroughMexximpRemodeler;
 hints.batchRenderStrategy.converter.remodelAfterMappingsFunction = @rtbFlythroughMitsubaRemodeler;
 
+
 %% Explore the scene in a figure.
 
 % left click points the camera
@@ -52,6 +56,7 @@ hints.batchRenderStrategy.converter.remodelAfterMappingsFunction = @rtbFlythroug
 % middle click describes the click point
 %mexximpScenePreview(scene);
 
+
 %% Choose some waypoints for the camera and falcon movement.
 falconPositionWaypoints = [ ...
     143 54 -44; ...
@@ -81,6 +86,7 @@ cameraTargetWaypoints = falconPositionWaypoints;
 cameraUpWaypoints = falconUpWaypoints;
 cameraFrames = linspace(0, 1, 6);
 
+
 %% Interpolate waypoints for several frames.
 nFrames = 12;
 frames = linspace(0, 1, nFrames);
@@ -115,6 +121,7 @@ nativeSceneFiles = rtbMakeSceneFiles(scene, ...
     'conditionsFile', conditionsFile, ...
     'hints', hints);
 
+
 %% Render and Show a montage.
 radianceDataFiles = rtbBatchRender(nativeSceneFiles, ...
     'hints', hints);