GAM670/DPS905 -- Weekly Schedule 20121

Week 1 - Jan 8

This Week

Assignment Discussion
Suggested Enhancements
Review of the Base Code
- Definition of a Framework
  - Modularity through stable interfaces
  - Re-usability through generic components
  - Extensibility through hook methods
  - Inversion of control - determines which application methods to invoke in response to external events
- Framework Architecture
  - Modelling Layer
  - API Translation Layer
- Notable Features of the Base Code
- camera, sound, and light are also derived from the Frame class
- textures attach at the object level
- texture connection is uncoupled from drawing of the graphics primitives
- reference frames are relative
- very simple collision detection

To Do

add your name to the student list
create a team page that includes the semester number 20121
- describe the game that you intend to develop
- list the topics of interest to your team in developing its game
- list the other topics of interest

Resources

Week 2 - Jan 16

This Week

Relative Reference Frames
- Recursive calls
  Vector Frame::position()
  
  Matrix Frame::rotation()
  
  Matrix Frame::world()
- Detaching from and attaching to a parent frame
  Frame::attachTo()
Geometry
- Plane
  normal + constant - examples
  
  equation of a plane: dot(n, x) + D = 0
  
  positive side of a plane dot(n, x) + D > 0
Collision Detection
types of colliders
spheres

planes

axis-aligned bounding boxes

oriented bounding boxes

To Do

Research the feature that you are going to add and prepare a plan of action
Prepare a team page for your team so that repos can be ordered
Add a section to your team page to track your project and solicit commentary

Resources

Week 3 - Jan 23

This Week

Collision Detection (cont'd)
Shape
Shape : Frame

Shape::setRadius()

Shape::getRadius()

Shape::setRadius(float r);

Shape::setRadius(float x, float y, float z);

Shape::getRadius() const { return radius; }

Shape::setPlane(Vector n, float d);

Shape::setAxisAligned(Vector min, Vector max);
Comprehensive Camerawork
rotation about an axis

order of rotation matters

Euler angles
3-2-1 angles

gimbal lock
StephenSeefeld.net

complex numbers
solution of cubic equations 16th century

two-dimensional representation

matrix representation

quaternions
extension of complex numbers

four-dimensional representation

matrix representation

geometric algebra (more abstract)
Dorst's site

Hitzer's site
Visibility Determination
- test a point for presence within a set of planes
  
  normal calculations - general rotation matrix - vector and angle
- ViewFrustum
  parameter - view * projection
  
  6 planes
  near and far planes
  
  left and right planes
  
  top and bottom planes
  
  coding
  constructor
  
  ViewFrustum::contains()
- Finite Size of Objects
  Expansion of the View Frustum
Index Buffers
amount of storage needed for vertex data

duplication of vertex data

indexing

indexed primitives

To Do

Resources

Wikipedia on Complex Numbers
Wikipedia on Quaternions
Wikipedia on quaternions and Spatial Rotations
Wolfram on Quaternions
CProgramming.com on Quaternions
Ogre intro on Quaternions
collision sample
indexBuffering sample

Week 4 - Jan 30

This Week

Meshes
What is a mesh?
vertex list -> vertex buffer

index list -> index buffer

attribute list -> subset to which primitives belong

pyramid sample

Stock Objects
Sphere
slices and partitions

Cylinder

Torus

Utah Teapot

APIGraphic.h and .cpp code

Custom Mesh
Create a Mesh

FVF settings

DrawSubset
DrawIndexedPrimitive parameters

APIGraphic.h code

X File
Create Mesh from File
SkyBox
definition of a skybox
attachment to camera

inverted coordinates

skybox textures

Graphic.cpp code

more complicated forms - skydome
Billboards
definition, purpose of a billboard

types of billboards
screen-aligned - useful for annotation text, lens flares
normal is opposite to camera heading

up is camera->up

axial - useful for cylindrical symmetry - trees (textured object does not face straight on)
up is fixed

normal faces the viewer as much as possible

view_plane - no distortion - useful for
normal is fixed (opposite to camera heading)

up is open to change

viewpoint - simulates distortion due to perspective projection - useful for clouds
normal is fixed (difference between viewpoint position and camera heading)

up is open to change

Object.h and Object.cpp code
Texture Filtering
mip maps
multum in parvo

texture creation

APITexture::SetSamplerState()
DirectX Errors
DirectX Utilities - Lookup Tool

APIDisplay::restore() example

To Do

Resources

Week 5 - Feb 6

This Week

Vertex Declarations
FVF Codes

D3DVERTEXELEMENT9 struct
The Pipeline
What is a pipeline
The GPU
What is a GPU
- nVidia
  GeForce
  
  Quadro
  
  Tesla
  
  Comparison
- AMD (previously ATI)
  Radeon 520
  
  Comparison
Shader Languages
what is a shader

dedicated shaders

unified shaders

how does a shader work
- Languages
  HLSL - Microsoft
  
  Cg - nVidia
  
  GLSL - OpenGL (Khronos)
Vertex Shaders
Pixel Shaders
effect of skybox and point light on frame rate

To Do

reorganize framework code so that vertex shader receives product of world, view, and projection matrices
- store viewProjection matrix as an instance variable in Display
- add viewProjection query to Display to extract product of view and projection matrices
- retrieve viewProjection in *::draw() method
- pre-multiply viewProjection by world to obtain composite matrix to pass to vertex shader
- add composite matrix to the constant table in the vertex shader
reorganize framework code to minimize duplication of heading normalization
- perform normalization of heading in Display::beginDraw()

Week 6 - Feb 13

This Week

Vertex Shader Programming
- Host

APIPlatformSettings.h - Vertex Shader Identification

// shader file data
#define VERTEX_SHADER_FILE        L"vertexShader.hlsl"
#define VERTEX_SHADER_ENTRY_POINT "vertexShader"

APIBase.h - pointers into the shader

    static IDirect3DVertexShader9* vertexShader; // vertex shader
    static ID3DXConstantTable*     uniformVS;    // for vertex shader

APIDisplay.h

    Matrix   projection;       // projection transformation

APIDisplay.cpp

    // points to compiled shader code
    LPD3DXBUFFER compiledCodeVS = nullptr;

    // check for minimum vertex shader version required
    if (caps.VertexShaderVersion < D3DVS_VERSION(2,0))
        error(L"Display::09 Device does not support vertex shader 2_0");

    // compile the vertex shader source code
    else if (FAILED(D3DXCompileShaderFromFile(VERTEX_SHADER_FILE, NULL,
     NULL, VERTEX_SHADER_ENTRY_POINT, D3DXGetVertexShaderProfile(d3dd),
     D3DXSHADER_DEBUG | D3DXSHADER_SKIPOPTIMIZATION,
     &compiledCodeVS, NULL, &uniformVS))) {
        release();
        error(L"APIDisplay::13 Unable to compile vertex shader");
    }
    // create the vertex shader object
    else if (FAILED(d3dd->CreateVertexShader(
     (DWORD*)compiledCodeVS->GetBufferPointer(), &vertexShader))) {
        compiledCodeVS->Release();
        release();
        error(L"APIDisplay::14 Unable to create vertex shader object");
    }
    else {
        compiledCodeVS->Release();

        d3dd->SetVertexShader(vertexShader);

    this->projection = *((Matrix*)projection);

    Matrix& v = *((Matrix*)view);
    Matrix viewProjection = v * projection;
    uniformVS->SetMatrix(d3dd, "viewProjection",
     (D3DXMATRIX*)&viewProjection);
    Vector heading(v.m13, v.m23, v.m33);
    // Required for specular lighting calculations
    uniformVS->SetFloatArray(d3dd, "heading", (FLOAT*)&heading, 3);

        Colour colour(red, green, blue);
        uniformVS->SetFloatArray(d3dd, "ambient", (FLOAT*)&colour, 4);
        uniformVS->SetInt(d3dd, "noLights", 4);

                uniformVS->SetBool(d3dd, "lighting", b);

        uniformVS->SetMatrix(d3dd, "world", (D3DXMATRIX*)world);

        uniformVS->SetFloatArray(d3dd, "material.ambient",  (FLOAT*)&r.ambient, 4);
        uniformVS->SetFloatArray(d3dd, "material.diffuse",  (FLOAT*)&r.diffuse, 4);
        uniformVS->SetFloatArray(d3dd, "material.specular", (FLOAT*)&r.specular, 4);
        uniformVS->SetFloat     (d3dd, "material.power",    (FLOAT)r.power);

    // release the shader COM objects
    if (uniformVS) {
        uniformVS->Release();
        uniformVS = nullptr;
    }
    if (vertexShader) {
        vertexShader->Release();
        vertexShader = nullptr;
    }

        // Populate the vertex shader constant table
        //
        // Light descriptors within the vertex shader
        char typ[] = "light[0].type";
        char amb[] = "light[0].ambient";
        char dif[] = "light[0].diffuse";
        char spe[] = "light[0].specular";
        char pos[] = "light[0].position";
        char dir[] = "light[0].direction";
        char spt[] = "light[0].spot";
        char att[] = "light[0].attenuation";
        char ran[] = "light[0].range";
        //
        // Reset index in light descriptor
        typ[6] = index + '0';
        amb[6] = index + '0';
        dif[6] = index + '0';
        spe[6] = index + '0';
        pos[6] = index + '0';
        dir[6] = index + '0';
        spt[6] = index + '0';
        att[6] = index + '0';
        ran[6] = index + '0';
        // Populate the vertex shader constant table
        Vector attenuation(attenuation0, attenuation1, attenuation2);
        Vector spot(cosf(phi/2), cosf(theta/2), falloff);
        Vector zero;
        uniformVS->SetInt(d3dd, typ, type);
        uniformVS->SetFloatArray(d3dd, amb, (FLOAT*)&ambient, 4);
        uniformVS->SetFloatArray(d3dd, dif, (FLOAT*)&diffuse, 4);
        uniformVS->SetFloatArray(d3dd, spe, (FLOAT*)&specular, 4);
        uniformVS->SetFloatArray(d3dd, pos, (FLOAT*)&zero, 3);
        uniformVS->SetFloatArray(d3dd, dir, (FLOAT*)&zero, 3);
        uniformVS->SetFloatArray(d3dd, att, (FLOAT*)&attenuation, 3);
        uniformVS->SetFloatArray(d3dd, spt, (FLOAT*)&spot, 3);
        uniformVS->SetFloat(d3dd, ran, range);
        rc = true;

        char constantLightOn[] = "lightOn[0]";
        constantLightOn[8] = index + '0';
        char pos[] = "light[0].position";
        char dir[] = "light[0].direction";
        pos[6] = index + '0';
        dir[6] = index + '0';
        uniformVS->SetFloatArray(d3dd, pos, (FLOAT*)&p, 3);
        uniformVS->SetFloatArray(d3dd, dir, (FLOAT*)&o, 3);
        uniformVS->SetBool(d3dd, constantLightOn, true);

        char constantLightOn[] = "lightOn[0]";
        constantLightOn[8] = index + '0';
        char pos[] = "light[0].position";
        char dir[] = "light[0].direction";
        pos[6] = index + '0';
        dir[6] = index + '0';
        uniformVS->SetFloatArray(d3dd, pos, (FLOAT*)&p, 3);
        uniformVS->SetFloatArray(d3dd, dir, (FLOAT*)&o, 3);
        uniformVS->SetBool(d3dd, constantLightOn, true);

        char constantLightOn[] = "lightOn[0]";
        constantLightOn[8] = index + '0';
        uniformVS->SetBool(d3dd, constantLightOn, false);

- Device
Fragment Shader
- Host
- Device

CDOT Wiki ^β

GAM670/DPS905 Weekly Schedule 20121

GAM670/DPS905 -- Weekly Schedule 20121

Week 1 - Jan 8

This Week

To Do

Resources

Week 2 - Jan 16

This Week

To Do

Resources

Week 3 - Jan 23

This Week

To Do

Resources

Week 4 - Jan 30

This Week

To Do

Resources

Week 5 - Feb 6

This Week

To Do

Week 6 - Feb 13

This Week

To Do

Resources

CDOT Wiki β

GAM670/DPS905 Weekly Schedule 20121

GAM670/DPS905 -- Weekly Schedule 20121

Week 1 - Jan 8

This Week

To Do

Resources

Week 2 - Jan 16

This Week

To Do

Resources

Week 3 - Jan 23

This Week

To Do

Resources

Week 4 - Jan 30

This Week

To Do

Resources

Week 5 - Feb 6

This Week

To Do

Week 6 - Feb 13

This Week

To Do

Resources

CDOT Wiki ^β