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/* This file is part of the Spring engine (GPL v2 or later), see LICENSE.html */
#ifndef _GL_LIGHTHANDLER_H
#define _GL_LIGHTHANDLER_H
#include <array>
#include "Light.h"
namespace Shader {
struct IProgramObject;
}
namespace GL {
struct LightHandler {
public:
void Init(unsigned int cfgMaxLights);
void Update();
unsigned int AddLight(const GL::Light&);
unsigned int SetLight(unsigned int lgtIndex, const GL::Light&);
GL::Light* GetLight(unsigned int lgtHandle);
const float* GetRawLightDataPtr(size_t i = 0) const { return &rawLights[i].worldPos.x; }
float* GetRawLightDataPtr(size_t i = 0) { return &rawLights[i].worldPos.x; }
static constexpr unsigned int MaxConfigLights() { return MAX_LIGHTS; }
unsigned int NumConfigLights() const { return maxLights; }
static constexpr unsigned int MaxUniformVecs() { return (MaxConfigLights() * (sizeof(RawLight) / sizeof(float4))); }
unsigned int NumUniformVecs() const { return (NumConfigLights() * (sizeof(RawLight) / sizeof(float4))); }
private:
static constexpr unsigned int MAX_LIGHTS = 32;
struct RawLight {
float4 worldPos;
float4 worldDir;
float4 diffColor;
float4 specColor;
float4 ambiColor;
float4 fovRadius;
};
std::array<GL::Light, MAX_LIGHTS> glLights;
std::array<RawLight, MAX_LIGHTS> rawLights;
unsigned int maxLights = 0;
unsigned int lightHandle = 0;
};
}
#endif // _GL_LIGHTHANDLER_H
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