Add a colored glare to exoplanet stars (#1511)

* Add possibility to multiply color to an image plane

* Add a colored glare to exoplanet stars (issue #1305)

modules/base/rendering/renderableplane.cpp

@@ -70,6 +70,13 @@ namespace {
         "This determines the blending mode that is applied to this plane."
     };
 
+    constexpr openspace::properties::Property::PropertyInfo MultiplyColorInfo = {
+        "MultiplyColor",
+        "Multiply Color",
+        "If set, the plane's texture is multiplied with this color. "
+        "Useful for applying a color grayscale images."
+    };
+
     struct [[codegen::Dictionary(RenderablePlane)]] Parameters {
         // [[codegen::verbatim(BillboardInfo.description)]]
         std::optional<bool> billboard;
@@ -83,6 +90,9 @@ namespace {
         };
         // [[codegen::verbatim(BlendModeInfo.description)]]
         std::optional<BlendMode> blendMode;
+
+        // [[codegen::verbatim(BlendModeInfo.description)]]
+        std::optional<glm::vec3> multiplyColor [[codegen::color()]];
     };
 #include "renderableplane_codegen.cpp"
 } // namespace
@@ -100,6 +110,7 @@ RenderablePlane::RenderablePlane(const ghoul::Dictionary& dictionary)
     , _blendMode(BlendModeInfo, properties::OptionProperty::DisplayType::Dropdown)
     , _billboard(BillboardInfo, false)
     , _size(SizeInfo, 10.f, 0.f, 1e25f)
+    , _multiplyColor(MultiplyColorInfo, glm::vec3(1.f), glm::vec3(0.f), glm::vec3(1.f))
 {
     Parameters p = codegen::bake<Parameters>(dictionary);
 
@@ -141,11 +152,15 @@ RenderablePlane::RenderablePlane(const ghoul::Dictionary& dictionary)
         }
     }
 
+    _multiplyColor = p.multiplyColor.value_or(_multiplyColor);
+
     addProperty(_billboard);
 
     addProperty(_size);
     _size.onChange([this](){ _planeIsDirty = true; });
 
+    addProperty(_multiplyColor);
+
     setBoundingSphere(_size);
 }
 
@@ -238,6 +253,8 @@ void RenderablePlane::render(const RenderData& data, RendererTasks&) {
 
     _shader->setUniform("texture1", unit);
 
+    _shader->setUniform("multiplyColor", _multiplyColor);
+
     bool usingFramebufferRenderer = global::renderEngine->rendererImplementation() ==
                                     RenderEngine::RendererImplementation::Framebuffer;
 

modules/base/rendering/renderableplane.h

@@ -31,6 +31,7 @@
 #include <openspace/properties/stringproperty.h>
 #include <openspace/properties/scalar/boolproperty.h>
 #include <openspace/properties/scalar/floatproperty.h>
+#include <openspace/properties/vector/vec3property.h>
 #include <ghoul/opengl/ghoul_gl.h>
 
 namespace ghoul::filesystem { class File; }
@@ -75,6 +76,7 @@ private:
 
     properties::BoolProperty _billboard;
     properties::FloatProperty _size;
+    properties::Vec3Property _multiplyColor;
 
     ghoul::opengl::ProgramObject* _shader = nullptr;