#include "common.h"
#include "Material.h"
#include "Texture.h"
#include "glInterface.h"
#include "RenderState.h"


namespace CHCDemoEngine
{

RgbaColor RandomColor(float a, float b)
{
	return RgbaColor(a + Random(b), a + Random(b), a + Random(b), 1);
}


void Material::InitMaterial()
{
	mTexture = NULL;
	mAlphaTestEnabled = false;

	mAmbientColor = RgbaColor(0.2f, 0.2f, 0.2f, 1.0f);
	mDiffuseColor = RgbaColor(1.0f, 1.0f, 1.0f, 1.0f);
	//mSpecularColor = RgbaColor(.0f, .0f, .0f, 1.0f);
	mSpecularColor = RgbaColor(0.5f, 0.5f, 0.5f, 1.0f);
	mEmmisiveColor = RgbaColor(.0f, .0f, .0f, 1.0f);
}


Material::Material()
{
	InitMaterial();
}


Material::Material(const RgbaColor &color):
mDiffuseColor(color),
mAmbientColor(color),
mSpecularColor(0, 0, 0, 1),
mTexture(NULL)
{
}


Material RandomMaterial()
{
	float a = 0.1f;
	float b = 0.9f;

	Material m;
	m.mDiffuseColor = RandomColor(a, b);

	return m;
}


//void Material::Render(RenderState *state)
void Material::Render(RenderState *state)
{
	state->SetState(mTexture != NULL, mAlphaTestEnabled);

	if (mTexture)
		mTexture->Bind();
	else
		glBindTexture(GL_TEXTURE_2D, 0);

	glMaterialfv(GL_FRONT, GL_AMBIENT, (float *)&mAmbientColor.r);
	glMaterialfv(GL_FRONT, GL_DIFFUSE, (float *)&mDiffuseColor.r);
	glMaterialfv(GL_FRONT, GL_EMISSION, (float *)&mEmmisiveColor.r);
	glMaterialfv(GL_FRONT, GL_SPECULAR, (float *)&mSpecularColor.r);
}


}