Lighting

For lighting:

include:

textfile.cpp
textfile.h

DeferredLighting.cpp
DeferredLighting.h

Shader.cpp
Shader.h

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Shaders needed:

dLight.frag
pLight.frag
pLight.vert
deferred_direct_target.frag
deferred_gather.frag
deferred_gather.vert

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To inlcude this shader in Graphics.cpp under Paul's program structure: this is the code:

@ top:

DeferredLighting* dfe;
std::string shaderPath = "../../shaders"; //this is the directory the shaders live in

float zNear = .1f;
float zFar = 100.f;

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in void GraphicsInit:

void GraphicsInit(int argc, char** argv) {

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glClearColor(1,1,1,1);

glClearDepth(1.f); //added

glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glEnable(GL_DEPTH_TEST);
glShadeModel(GL_SMOOTH);

// Initialize camera
cam.pos = STVector3(0.f, 0.f, 4.f);
cam.up = STVector3(0.f, 1.f, 0.f);
cam.pan = STVector3(0.f, 0.f, 0.f);

// Enable global lights
glEnable(GL_LIGHTING);
glEnable(GL_LIGHT0);
float light0Position[4] = {cam.pos.x, cam.pos.y, cam.pos.z, 1.f};
glLightfv(GL_LIGHT0, GL_POSITION, light0Position);

// Enable texture
glEnable(GL_TEXTURE_2D);

dfe = new DeferredLighting(windowWidth, windowHeight); //added
dfe->Init(shaderPath); //added

}

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in display function:

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void display() {
	glClearColor(1,1,1,1);
	glClearDepth(1.f); //added
	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

	glEnable(GL_DEPTH_TEST); //added (I'm not sure if this is actually needed here but that is what I have)

	dfe->PreDrawScene();//added
	
	glMatrixMode(GL_MODELVIEW);
	glLoadIdentity();
	gluLookAt(cam.pos.x+cam.pan.x, cam.pos.y+cam.pan.y, cam.pos.z+cam.pan.z, cam.pan.x, cam.pan.y, cam.pan.z, cam.up.x, cam.up.y, cam.up.z);

	gameLogic();

	// Draw
	for(unsigned i = 0; i<renderList.size(); i++)
	renderList[i]->render();

	renderList.clear();

	dfe->PostDrawScene();//added
	
	//rendering part
	dfe->DrawDirectionalAndAmbient(windowWidth, windowHeight); //added
	dfe->PreDrawPOintLights(windowWidth, windowHeight, zNear, zFar);
	DrawPointLights(); //added (see below)
	dfe->PostDrawPointLights(); //added

	DrawLittleLights();//added (see below) (this will go away once the fire is in, it is only to see the lights in real space)

	glutSwapBuffers();
} 

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//code below here is referenced above but only draws a static point light in space //it is not going to stay this way but it will help as a place holder

//gluLookAt may have to be changed**

/------------------------------------------ Sets the point light. Creates a sphere for visualization of the light in space. ------------------------------------------/

void DrawPointLights() { glDisable(GL_LIGHTING); glMatrixMode(GL_MODELVIEW); glLoadIdentity(); //view(); gluLookAt(eye.x, eye.y, eye.z, imageCenter.x, imageCenter.y, imageCenter.z, 0.f, 1.f, 0.f);

dfe->SetPointLightColor(1.0, 1.0, 1.0);
glPushMatrix();

glTranslatef(-2.0f, -2.0f, 6.0f);
glutSolidSphere(0.5f, 5, 5);
glPopMatrix();

}

/--------------------------------------- Draws the actual body of light source. This is only for visualization purposes. ---------------------------------------/

void DrawLittleLights() { glDisable(GL_LIGHTING); glMatrixMode(GL_MODELVIEW); glLoadIdentity(); gluLookAt(eye.x, eye.y, eye.z, imageCenter.x, imageCenter.y, imageCenter.z, 0.f, 1.f, 0.f);

glColor3f(1.0, 1.0, 1.0);
glPushMatrix();

glTranslatef(-2.0f, -2.0f, 6.0f);
glutSolidSphere(0.5f, 5, 5);
glPopMatrix();

}