GAM670/DPS905 Weekly Schedule 20121

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GAM670/DPS905 | Weekly Schedule | Student List | Project Requirements | Teams and their Projects | Student Resources


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

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


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

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);

    D3DXCOLOR*          ambient;
    D3DXCOLOR*          diffuse;
    D3DXCOLOR*          specular;
    FLOAT*              power;

    ambient  = nullptr;
    diffuse  = nullptr;
    specular = nullptr;
    power    = nullptr;

    ambient  = nullptr;
    diffuse  = nullptr;
    specular = nullptr;
    power    = nullptr;

        if (ambient)
            delete [] ambient;
        if (diffuse)
            delete [] diffuse;
        if (specular)
            delete [] specular;
        if (power)
            delete [] power;
        ambient  = new D3DXCOLOR[src.nSubsets];
        diffuse  = new D3DXCOLOR[src.nSubsets];
        specular = new D3DXCOLOR[src.nSubsets];
        power    = new FLOAT[src.nSubsets];

        for (unsigned i = 0; i < nSubsets; i++) {
            ambient[i]  = src.ambient[i];
            diffuse[i]  = src.diffuse[i];
            specular[i] = src.specular[i];
            power[i]    = src.power[i];
        }

        ambient  = new D3DXCOLOR[nSubsets];
        diffuse  = new D3DXCOLOR[nSubsets];
        specular = new D3DXCOLOR[nSubsets];
        power    = new FLOAT[nSubsets];

            ambient[i].r = matl[i].MatD3D.Diffuse.r * 0.7f;
            ambient[i].g = matl[i].MatD3D.Diffuse.g * 0.7f;
            ambient[i].b = matl[i].MatD3D.Diffuse.b * 0.7f;
            ambient[i].a = matl[i].MatD3D.Diffuse.a;
            diffuse[i]   = matl[i].MatD3D.Diffuse; // reflected from lights
            specular[i]  = matl[i].MatD3D.Specular;       // shine from lights
            power[i]     = matl[i].MatD3D.Power; // 0 if it shouldn't be shiny

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

    if (ambient)
        delete [] ambient;
    if (diffuse)
        delete [] diffuse;
    if (specular)
        delete [] specular;
    if (power)
        delete [] power;
    • Device
  • Fragment Shader
    • Host
    • Device

To Do

Resources

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