/**
 * =========================================================================
 * File        : LightEnv.cpp
 * Project     : Pyrogenesis
 * Description : CLightEnv implementation
 * =========================================================================
 */

#include "precompiled.h"

#include "maths/MathUtil.h"

#include "graphics/LightEnv.h"


CLightEnv::CLightEnv()
    : m_Elevation(DEGTORAD(45)),
    m_Rotation(DEGTORAD(315)),
    m_TerrainShadowTransparency(0.0),
    m_SunColor(1, 1, 1),
    m_TerrainAmbientColor(164/255.f, 164/255.f, 164/255.f),
    m_UnitsAmbientColor(164/255.f, 164/255.f, 164/255.f)
{
    CalculateSunDirection();
}

void CLightEnv::SetElevation(float f)
{
    m_Elevation = f;
    CalculateSunDirection();
}

void CLightEnv::SetRotation(float f)
{
    m_Rotation = f;
    CalculateSunDirection();
}

void CLightEnv::SetTerrainShadowTransparency(float f)
{
    m_TerrainShadowTransparency = f;
}

void CLightEnv::CalculateSunDirection()
{
    m_SunDir.Y=-float(sin(m_Elevation));
    float scale=1+m_SunDir.Y;
    m_SunDir.X=scale*float(sin(m_Rotation));
    m_SunDir.Z=scale*float(cos(m_Rotation));
    m_SunDir.Normalize();
}