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light.cpp
163 lines (132 loc) · 3.29 KB
/
light.cpp
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#include "light.h"
int Light::numLights = 0;
vector<int> Light::availableLights;
vector<Light*> Light::lights;
void Light::Initialize(void)
{
glGetIntegerv(GL_MAX_LIGHTS, &numLights);
for(int i = 0; i < numLights; i++)
availableLights.push_back(GL_LIGHT0 + i);
}
Light::Light(LIGHT_TYPE type)
{
lights.push_back(this);
if(availableLights.size() > 0)
{
lightNum = availableLights[0];
availableLights.erase(availableLights.begin());
Visible(true);
setLightType(type);
setPosition(0, 0, 0);
setCutoff(45);
setExponent(12);
setSpotDirection(0, -1, 0);
setAmbient(0, 0, 0, 1);
setDiffuse(1, 1, 1, 1);
setSpecular(1, 1, 1, 1);
updateLight();
}
else
{
lightNum = 0;
Visible(false);
}
}
Light::~Light()
{
if(lightNum != 0)
availableLights.push_back(lightNum);
for(vector<Light*>::iterator it = lights.begin(); it != lights.end(); it++)
{
if((*it) == this)
lights.erase(it);
}
}
void Light::Visible(bool value)
{
visible = value;
if(visible == true)
glEnable(lightNum);
else
glDisable(lightNum);
}
void Light::setDiffuse(float r, float g, float b, float a){
diffuse[0] = r;
diffuse[1] = g;
diffuse[2] = b;
diffuse[3] = a;
glLightfv(lightNum, GL_DIFFUSE, diffuse);
}
void Light::setAmbient(float r, float g, float b, float a)
{
ambient[0] = r;
ambient[1] = g;
ambient[2] = b;
ambient[3] = a;
glLightfv(lightNum, GL_AMBIENT, ambient);
}
void Light::setSpecular(float r, float g, float b, float a)
{
specular[0] = r;
specular[1] = g;
specular[2] = b;
specular[3] = a;
glLightfv(lightNum, GL_SPECULAR, specular);
}
void Light::setLightType(LIGHT_TYPE type)
{
lightType = type;
if(lightType == LIGHT_SPOT)
{
position[3] = 1.0f;
}
else if (lightType == LIGHT_POINT)
{
position[3] = 1.0f;
setCutoff(180.0f);
}
else if(lightType == LIGHT_DIRECTIONAL)
{
position[3] = 0.0f;
}
updateLight();
}
void Light::setPosition(float x, float y, float z)
{
position[0] = x;
position[1] = y;
position[2] = z;
glLightfv(lightNum, GL_POSITION, position);
}
void Light::setSpotDirection(float x, float y, float z)
{
spotDirection[0] = x;
spotDirection[1] = y;
spotDirection[2] = z;
glLightfv(lightNum, GL_SPOT_DIRECTION, spotDirection);
}
void Light::setCutoff(float value)
{
cutoff = value;
glLightf(lightNum, GL_SPOT_CUTOFF, cutoff);
}
void Light::setExponent(float value)
{
exponent = value;
glLightf(lightNum, GL_SPOT_EXPONENT, exponent);
}
void Light::setAttenuation(float constant, float linear, float quadratic)
{
glLightf(lightNum, GL_CONSTANT_ATTENUATION, constant);
glLightf(lightNum, GL_LINEAR_ATTENUATION, linear);
glLightf(lightNum, GL_QUADRATIC_ATTENUATION, quadratic);
}
int Light::getLightNum(void)
{
return lightNum;
}
void Light::updateLight(void)
{
glLightfv(lightNum, GL_POSITION, position);
glLightfv(lightNum, GL_SPOT_DIRECTION, spotDirection);
}