From bf90df100e120e272c14c7975a22ed01bf3ad215 Mon Sep 17 00:00:00 2001
From: Lizzy Fleckenstein <eliasfleckenstein@web.de>
Date: Thu, 13 Apr 2023 08:40:18 +0200
Subject: Add back lighting system

Code is taken from latest irrlicht trunk; this is relevant because there have been fixes to stencil shadows since 1.8.5 (irrlicht SVN revision 5933).
---
 source/Irrlicht/CNullDriver.cpp | 75 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 75 insertions(+)

(limited to 'source/Irrlicht/CNullDriver.cpp')

diff --git a/source/Irrlicht/CNullDriver.cpp b/source/Irrlicht/CNullDriver.cpp
index 6ef7c17..e829c56 100644
--- a/source/Irrlicht/CNullDriver.cpp
+++ b/source/Irrlicht/CNullDriver.cpp
@@ -55,6 +55,7 @@ CNullDriver::CNullDriver(io::IFileSystem* io, const core::dimension2d<u32>& scre
 	DriverAttributes = new io::CAttributes();
 	DriverAttributes->addInt("MaxTextures", MATERIAL_MAX_TEXTURES);
 	DriverAttributes->addInt("MaxSupportedTextures", MATERIAL_MAX_TEXTURES);
+	DriverAttributes->addInt("MaxLights", getMaximalDynamicLightAmount());
 	DriverAttributes->addInt("MaxAnisotropy", 1);
 //	DriverAttributes->addInt("MaxUserClipPlanes", 0);
 //	DriverAttributes->addInt("MaxAuxBuffers", 0);
@@ -865,6 +866,80 @@ const wchar_t* CNullDriver::getName() const
 }
 
 
+
+//! Draws a shadow volume into the stencil buffer. To draw a stencil shadow, do
+//! this: First, draw all geometry. Then use this method, to draw the shadow
+//! volume. Then, use IVideoDriver::drawStencilShadow() to visualize the shadow.
+void CNullDriver::drawStencilShadowVolume(const core::array<core::vector3df>& triangles, bool zfail, u32 debugDataVisible)
+{
+}
+
+
+//! Fills the stencil shadow with color. After the shadow volume has been drawn
+//! into the stencil buffer using IVideoDriver::drawStencilShadowVolume(), use this
+//! to draw the color of the shadow.
+void CNullDriver::drawStencilShadow(bool clearStencilBuffer,
+		video::SColor leftUpEdge, video::SColor rightUpEdge,
+		video::SColor leftDownEdge, video::SColor rightDownEdge)
+{
+}
+
+
+//! deletes all dynamic lights there are
+void CNullDriver::deleteAllDynamicLights()
+{
+	Lights.set_used(0);
+}
+
+
+//! adds a dynamic light
+s32 CNullDriver::addDynamicLight(const SLight& light)
+{
+	Lights.push_back(light);
+	return Lights.size() - 1;
+}
+
+//! Turns a dynamic light on or off
+//! \param lightIndex: the index returned by addDynamicLight
+//! \param turnOn: true to turn the light on, false to turn it off
+void CNullDriver::turnLightOn(s32 lightIndex, bool turnOn)
+{
+	// Do nothing
+}
+
+
+//! returns the maximal amount of dynamic lights the device can handle
+u32 CNullDriver::getMaximalDynamicLightAmount() const
+{
+	return 0;
+}
+
+
+//! Returns current amount of dynamic lights set
+//! \return Current amount of dynamic lights set
+u32 CNullDriver::getDynamicLightCount() const
+{
+	return Lights.size();
+}
+
+
+//! Returns light data which was previously set by IVideoDriver::addDynamicLight().
+//! \param idx: Zero based index of the light. Must be greater than 0 and smaller
+//! than IVideoDriver()::getDynamicLightCount.
+//! \return Light data.
+const SLight& CNullDriver::getDynamicLight(u32 idx) const
+{
+	if ( idx < Lights.size() )
+		return Lights[idx];
+	else
+	{
+		_IRR_DEBUG_BREAK_IF(true)
+		static const SLight dummy;
+		return dummy;
+	}
+}
+
+
 //! Creates a boolean alpha channel of the texture based of an color key.
 void CNullDriver::makeColorKeyTexture(video::ITexture* texture,
 									video::SColor color,
-- 
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