WIP adding directory structure

kraken/nodes/KRLight.h

@@ -0,0 +1,106 @@
+//
+//  KRLight.h
+//  Kraken Engine
+//
+//  Copyright 2024 Kearwood Gilbert. All rights reserved.
+//  
+//  Redistribution and use in source and binary forms, with or without modification, are
+//  permitted provided that the following conditions are met:
+//  
+//  1. Redistributions of source code must retain the above copyright notice, this list of
+//  conditions and the following disclaimer.
+//  
+//  2. Redistributions in binary form must reproduce the above copyright notice, this list
+//  of conditions and the following disclaimer in the documentation and/or other materials
+//  provided with the distribution.
+//  
+//  THIS SOFTWARE IS PROVIDED BY KEARWOOD GILBERT ''AS IS'' AND ANY EXPRESS OR IMPLIED
+//  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+//  FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL KEARWOOD GILBERT OR
+//  CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+//  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+//  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+//  ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+//  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+//  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//  
+//  The views and conclusions contained in the software and documentation are those of the
+//  authors and should not be interpreted as representing official policies, either expressed
+//  or implied, of Kearwood Gilbert.
+//
+#pragma once
+
+#include "resources/KRResource.h"
+#include "KRNode.h"
+#include "resources/texture/KRTexture.h"
+
+static const float KRLIGHT_MIN_INFLUENCE = 0.15f; // 0.05f
+
+// KRENGINE_MAX_SHADOW_BUFFERS must be at least 6 to allow omni-directional lights to render cube maps
+
+#define KRENGINE_MAX_SHADOW_BUFFERS 6
+#define KRENGINE_SHADOW_MAP_WIDTH 1024
+#define KRENGINE_SHADOW_MAP_HEIGHT 1024
+
+class KRLight : public KRNode
+{
+public:
+  static void InitNodeInfo(KrNodeInfo* nodeInfo);
+
+  virtual ~KRLight();
+  virtual std::string getElementName() = 0;
+  virtual tinyxml2::XMLElement* saveXML(tinyxml2::XMLNode* parent);
+  virtual void loadXML(tinyxml2::XMLElement* e);
+
+  void setIntensity(float intensity);
+  float getIntensity();
+  void setDecayStart(float decayStart);
+  float getDecayStart();
+  const hydra::Vector3& getColor();
+  void setColor(const hydra::Vector3& color);
+
+  void setFlareTexture(std::string flare_texture);
+  void setFlareSize(float flare_size);
+  void setFlareOcclusionSize(float occlusion_size);
+  void deleteBuffers();
+
+  virtual void render(RenderInfo& ri);
+
+  int getShadowBufferCount();
+  int* getShadowTextures();
+  KRViewport* getShadowViewports();
+
+
+protected:
+  KRLight(KRScene& scene, std::string name);
+
+  float m_intensity;
+  float m_decayStart;
+  hydra::Vector3 m_color;
+
+  std::string m_flareTexture;
+  KRTexture* m_pFlareTexture;
+  float m_flareSize;
+  float m_flareOcclusionSize;
+
+  bool m_casts_shadow;
+  bool m_light_shafts;
+  float m_dust_particle_density;
+  float m_dust_particle_size;
+  float m_dust_particle_intensity;
+
+  int m_occlusionQuery; // Occlusion query for attenuating occluded flares
+
+
+  // Shadow Maps
+  int m_cShadowBuffers;
+  int shadowFramebuffer[KRENGINE_MAX_SHADOW_BUFFERS], shadowDepthTexture[KRENGINE_MAX_SHADOW_BUFFERS];
+  bool shadowValid[KRENGINE_MAX_SHADOW_BUFFERS];
+  KRViewport m_shadowViewports[KRENGINE_MAX_SHADOW_BUFFERS];
+
+  void allocateShadowBuffers(int cBuffers);
+  void invalidateShadowBuffers();
+
+  virtual int configureShadowBufferViewports(const KRViewport& viewport);
+  void renderShadowBuffers(RenderInfo& ri);
+};