#include "dxstdafx.h"
#include ".\depthrenderstrategy.h"
#include "PathMapEffect.h"
#include "Entity.h"
#include "SubEntity.h"

DepthRenderStrategy::DepthRenderStrategy(PathMapEffect* pathMapEffect)
:RenderStrategy(pathMapEffect)
{
}

void DepthRenderStrategy::applyTargets() const
{
	LPDIRECT3DDEVICE9 device = pathMapEffect->device;
	device->SetRenderTarget(0, pathMapEffect->fakeSurface);
	device->SetDepthStencilSurface( pathMapEffect->depthMapDepthStencilBuffer);
}

void DepthRenderStrategy::applyRenderState() const
{
	LPDIRECT3DDEVICE9 device = pathMapEffect->device;
	device->SetRenderState(D3DRS_COLORWRITEENABLE, 0);
	// render backfaces to avoid z-fighting
	device->SetRenderState(D3DRS_CULLMODE, D3DCULL_CW);

	device->Clear( 0, NULL, D3DCLEAR_ZBUFFER, D3DCOLOR_ARGB(255, 0, 0, 0), 1.0f, 0 );
}

void DepthRenderStrategy::applyTechnique() const
{
	pathMapEffect->effect->SetTechnique("Depth");
}

void DepthRenderStrategy::applyTransforms(Entity* entity) const
{
	LPD3DXEFFECT effect = pathMapEffect->effect;
	effect->SetMatrix("modelToProjMatrix", 
		&( entity->modelWorldTransform * *camera.GetViewMatrix() * *camera.GetProjMatrix() ) );
	effect->CommitChanges();
}


void DepthRenderStrategy::resetRenderState() const
{
	LPDIRECT3DDEVICE9 device = pathMapEffect->device;
	device->SetRenderState(D3DRS_CULLMODE, D3DCULL_CCW);
	device->SetRenderState(D3DRS_COLORWRITEENABLE, D3DCOLORWRITEENABLE_RED | D3DCOLORWRITEENABLE_GREEN | D3DCOLORWRITEENABLE_BLUE | D3DCOLORWRITEENABLE_ALPHA);
}