GAM670/DPS905 Weekly Schedule 20121

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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

1. add your name to the student list
2. 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

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

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

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

Resources

• meshes sample
• Rob Whitaker on Skyboxes
• Image Based Rendering - Suman Nadella on Billboarding and Imposters
• DigitalRune
• Wikipedia on Texture Filtering
• D3D 9 tutorial on modeling with an Index list

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