Light.cpp

#include "Light.h"

Light::Light()
{
	colour = glm::vec3(1.0f, 1.0f, 1.0f);
	ambientIntensity = 1.0f;

	direction = glm::vec3(0.0f, -1.0f, 0.0f);
	diffuseIntensity = 0.0f;
}

Light::Light(GLuint shadowWidth, GLuint shadowHeight, GLfloat red, GLfloat green, GLfloat blue, GLfloat aIntensity,
	GLfloat xDir, GLfloat yDir, GLfloat zDir, GLfloat dIntensity)
{
	colour = glm::vec3(red, green, blue);
	ambientIntensity = aIntensity;

	direction = glm::vec3(xDir, yDir, zDir);
	diffuseIntensity = dIntensity;

	shadowMap = new ShadowMap();
	shadowMap->Init(shadowWidth, shadowHeight);

	lightProj = glm::ortho(-300.0f, 300.0f, -400.0f, 400.0f, 0.1f, 1000.0f);
}

void Light::UseLight(GLfloat ambientIntensityLocation, GLfloat ambientColourLocation,
	GLfloat diffuseIntensityLocation, GLfloat directionLocation)
{
	glUniform3f(ambientColourLocation, colour.x, colour.y, colour.z);
	glUniform1f(ambientIntensityLocation, ambientIntensity);

	glUniform3f(directionLocation, direction.x, direction.y, direction.z);
	glUniform1f(diffuseIntensityLocation, diffuseIntensity);
}

glm::mat4 Light::CalculateLightTransform()
{
	return lightProj * glm::lookAt(-direction, glm::vec3(0.0f, 0.0f, 0.0f), glm::vec3(0.0f, 1.0f, 0.0f));
}

Light::~Light()
{
}