flashlight.cpp

c++程序

// Flashlight.cpp: Implementierung der Klasse CFlashlight.
//
//////////////////////////////////////////////////////////////////////

#include "stdafx.h"
#include "Flashlight.h"

//////////////////////////////////////////////////////////////////////
// Konstruktion/Destruktion
//////////////////////////////////////////////////////////////////////

CFlashlight::CFlashlight()
{

}

CFlashlight::~CFlashlight()
{
	glDisable(m_GLLightIndex);
}

void CFlashlight::SetupLight(unsigned int iGLLightIndex)
{
	// Setup flashlight

	// Call base class to keep the light index
	CLight::SetupLight(iGLLightIndex);
	
	float fDiffuse[] = { 1.0f, 1.0f, 1.0f, 1.0f };
	float fDirection[] = { 0.0f, -0.25f, -1.0f};
	glLightfv(iGLLightIndex, GL_DIFFUSE, fDiffuse);

	// Turn it into a spotlight
	glLightf(iGLLightIndex, GL_SPOT_CUTOFF, 15.0f);
	glLightf(iGLLightIndex, GL_SPOT_EXPONENT, 128.0f);

	glEnable(m_GLLightIndex);
}

void CFlashlight::UpdatePosition()
{
	// Update the light's position before the camera transformation
	float SpotLightPos[] = { 0.0f, 0.0f, 1.0f, 1.0f };
	glLightfv(m_GLLightIndex, GL_POSITION, SpotLightPos);
}