windows-server-2003/shell/osshell/control/scrnsave/flyingobjects/genwin.cpp

/******************************Module*Header*******************************\
* Module Name: genwin.c
*
* The Windows Logo style of the 3D Flying Objects screen saver.
*
* Animated 3D model of the Microsoft (R) Windows NT (TM) flag logo.
*
* Copyright (c) 1994 Microsoft Corporation
*
\**************************************************************************/

#include <stdlib.h>
#include <windows.h>
#include <string.h>
#include <math.h>
#include <d3dx8.h>
#include "D3DSaver.h"
#include "FlyingObjects.h"
#include "mesh.h"

#define WIN_TOP_BORDER      (float)0.1
#define WIN_RIGHT_BORDER    WIN_TOP_BORDER
#define WIN_CROSSBAR        (0.6522f * WIN_TOP_BORDER)
#define WIN_NUMPIECES       7
#define WIN_NUMCOLUMNS      6
#define WIN_GAP             (WIN_TOP_BORDER / 8.0f)
#define WIN_GAP_X           (2.0f * WIN_GAP)
#define WIN_HEIGHT          ((WIN_GAP * 6.0f) + \
                                (WIN_NUMPIECES * WIN_TOP_BORDER))
#define WIN_WIDTH           (0.7024f * WIN_HEIGHT)
#define WIN_THICKNESS       WIN_CROSSBAR

#define WIN_TOTALWIDTH      (WIN_TOP_BORDER * 1.1f * (float)WIN_NUMCOLUMNS + \
                             WIN_WIDTH)

#define BLOCK_TOP            0x0001
#define BLOCK_BOTTOM         0x0002
#define BLOCK_LEFT           0x0004
#define BLOCK_RIGHT          0x0008
#define BLOCK_FRONT          0x0010
#define BLOCK_BACK           0x0020
#define BLOCK_ALL            0x003f
#define DELTA_BLEND          0x2000
#define NO_BLEND             0x1000

#define CUBE_FACES          6
#define CUBE_POINTS         8

#define MAX_FRAMES 20

#define MAXPREC 15
#define S_IPREC 3

static int Frames = 10;
static MESH winMesh[MAX_FRAMES];
static MESH winStreamer[MAX_FRAMES];
static float sinAngle = 0.0f;
static float xTrans = 0.2f;
static int curMatl = 0;
static int iPrec = 10;

static RGBA matlBrightSpecular = {1.0f, 1.0f, 1.0f, 1.0f};
static RGBA matlDimSpecular = {0.3f, 0.3f, 0.3f, 1.0f};
static RGBA matlNoSpecular = {0.0f, 0.0f, 0.0f, 0.0f};
static FLOAT light0Pos[] = {20.0f, -10.0f, 20.0f, 0.0f};

static RGBA light1Ambient  = {0.0f, 0.0f, 0.0f, 0.0f};
static RGBA light1Diffuse  = {0.4f, 0.4f, 0.4f, 1.0f};
static RGBA light1Specular = {0.0f, 0.0f, 0.0f, 0.0f};
static FLOAT light1Pos[] = {-20.0f, 5.0f, 0.0f, 0.0f};

static RGBA winColors[] = {{0.3f, 0.3f, 0.3f, 1.0f},
                           {0.94f, 0.37f, 0.13f, 1.0f},    // red
                           {0.22f, 0.42f, 0.78f, 1.0f},    // blue
                           {0.35f, 0.71f, 0.35f, 1.0f},    // green
                           {0.95f, 0.82f, 0.12f, 1.0f}};   // yellow




static int iPtInList(MESH *mesh, int start, 
                     POINT3D *p, POINT3D *norm, BOOL blend)
{
    int i;
    POINT3D *pts = mesh->pts + start;

    if (blend) {
        for (i = start; i < mesh->numPoints; i++, pts++) {
            if ((pts->x == p->x) && (pts->y == p->y) && (pts->z == p->z)) {
                mesh->norms[i].x += norm->x;
                mesh->norms[i].y += norm->y;
                mesh->norms[i].z += norm->z;
                return i;
            }
        }
    } else {
        i = mesh->numPoints;
    }
    
    mesh->pts[i] = *p;
    mesh->norms[i] = *norm;
    mesh->numPoints++;
    return i;
}




float getZPos(float x)
{
    float xAbs = x - xTrans;
    float angle = (float) (sinAngle + ((2.0 * PI) * (xAbs / WIN_TOTALWIDTH)));

    xAbs += (WIN_TOTALWIDTH / 2.0f);
    xAbs = WIN_TOTALWIDTH - xAbs;

    return (float)((sin((double)angle) / 4.0) * 
                   sqrt((double)(xAbs / WIN_TOTALWIDTH )));
}




void AddFace(MESH *mesh, int startBlend, POINT3D *pos, float w, float h)
{
#define FACE_VERTEX(i) \
    iPtInList(mesh, startBlend, pts + i, &mesh->faces[faceCount].norm, TRUE)

    int faceCount = mesh->numFaces;     
    int numPts = mesh->numPoints;
    POINT3D *pts = mesh->pts + numPts;
    float zLeft = getZPos(pos->x);
    float zRight = getZPos(pos->x + w);

    pts->x = (float)pos->x; 
    pts->y = (float)pos->y;   
    pts->z = zLeft; 
    pts++;

    pts->x = (float)pos->x;
    pts->y = (float)(pos->y + h);  
    pts->z = zLeft;  
    pts++;

    pts->x = (float)(pos->x + w);  
    pts->y = (float)(pos->y + h);  
    pts->z = zRight;  
    pts++;

    pts->x = (float)(pos->x + w);
    pts->y = (float)pos->y;  
    pts->z = zRight;

    pts -= 3;

    mesh->faces[faceCount].material = curMatl;
    ss_calcNorm(&mesh->faces[faceCount].norm, pts + 2, pts + 1, pts);
    mesh->faces[faceCount].p[3] = FACE_VERTEX(0);
    mesh->faces[faceCount].p[2] = FACE_VERTEX(1);
    mesh->faces[faceCount].p[1] = FACE_VERTEX(2);
    mesh->faces[faceCount].p[0] = FACE_VERTEX(3);
    mesh->numFaces++;
}




#define BLOCK_VERTEX(face, i)\
{\
    if (flags & DELTA_BLEND) {\
        mesh->faces[faceCount].p[face] = \
            iPtInList(mesh, blendStart, &pts[i], &norms[((i & 0x2) >> 1)],\
                      bBlend);\
    } else\
        mesh->faces[faceCount].p[face] = \
            iPtInList(mesh, blendStart, &pts[i],\
                      &mesh->faces[faceCount].norm, bBlend);\
}


#define DELTA_FACT  (float)10.0



void AddBlock(MESH *mesh, int blendStart, POINT3D *pos, 
              float w, float h, float d, ULONG flags)
{

    POINT3D pts[8];
    POINT3D ptsL[8];
    POINT3D ptsR[8];
    POINT3D norms[2];
    POINT3D posPrev;
    float zLeft = getZPos(pos->x);
    float zRight = getZPos(pos->x + w);
    int faceCount = mesh->numFaces;     
    BOOL bBlend = ((flags & NO_BLEND) == 0);

    flags |= DELTA_BLEND;

    pts[0].x = (float)pos->x; 
    pts[0].y = (float)(pos->y + h);   
    pts[0].z = zLeft;

    pts[1].x = (float)pos->x;
    pts[1].y = (float)(pos->y + h);  
    pts[1].z = zLeft + d;  

    pts[2].x = (float)(pos->x + w);  
    pts[2].y = (float)(pos->y + h);  
    pts[2].z = zRight + d;  

    pts[3].x = (float)(pos->x + w);
    pts[3].y = (float)(pos->y + h);
    pts[3].z = zRight;

    pts[4].x = (float)pos->x;
    pts[4].y = (float)pos->y;
    pts[4].z = zLeft;

    pts[5].x = (float)pos->x;
    pts[5].y = (float)pos->y;
    pts[5].z = zLeft + d;  

    pts[6].x = (float)(pos->x + w);  
    pts[6].y = (float)pos->y;
    pts[6].z = zRight + d;  

    pts[7].x = (float)(pos->x + w);  
    pts[7].y = (float)pos->y;
    pts[7].z = zRight;

    if (flags & DELTA_BLEND) 
    {
    	float prevW = w;
        posPrev = *pos;

        w /= DELTA_FACT;
        zRight = getZPos(pos->x + w);

        ptsL[0].x = (float)pos->x; 
        ptsL[0].y = (float)(pos->y + h);   
        ptsL[0].z = zLeft;

        ptsL[1].x = (float)pos->x;
        ptsL[1].y = (float)(pos->y + h);  
        ptsL[1].z = zLeft + d;  

        ptsL[2].x = (float)(pos->x + w);  
        ptsL[2].y = (float)(pos->y + h);  
        ptsL[2].z = zRight + d;  

        ptsL[3].x = (float)(pos->x + w);
        ptsL[3].y = (float)(pos->y + h);
        ptsL[3].z = zRight;

        ptsL[4].x = (float)pos->x;
        ptsL[4].y = (float)pos->y;
        ptsL[4].z = zLeft;

        ptsL[5].x = (float)pos->x;
        ptsL[5].y = (float)pos->y;
        ptsL[5].z = zLeft + d;  

        ptsL[6].x = (float)(pos->x + w);  
        ptsL[6].y = (float)pos->y;
        ptsL[6].z = zRight + d;  

        ptsL[7].x = (float)(pos->x + w);  
        ptsL[7].y = (float)pos->y;
        ptsL[7].z = zRight;

        pos->x += (prevW - w);
        zLeft = getZPos(pos->x);
        zRight = getZPos(pos->x + w);

        ptsR[0].x = (float)pos->x; 
        ptsR[0].y = (float)(pos->y + h);   
        ptsR[0].z = zLeft;

        ptsR[1].x = (float)pos->x;
        ptsR[1].y = (float)(pos->y + h);  
        ptsR[1].z = zLeft + d;  

        ptsR[2].x = (float)(pos->x + w);  
        ptsR[2].y = (float)(pos->y + h);  
        ptsR[2].z = zRight + d;  

        ptsR[3].x = (float)(pos->x + w);
        ptsR[3].y = (float)(pos->y + h);
        ptsR[3].z = zRight;

        ptsR[4].x = (float)pos->x;
        ptsR[4].y = (float)pos->y;
        ptsR[4].z = zLeft;

        ptsR[5].x = (float)pos->x;
        ptsR[5].y = (float)pos->y;
        ptsR[5].z = zLeft + d;  

        ptsR[6].x = (float)(pos->x + w);  
        ptsR[6].y = (float)pos->y;
        ptsR[6].z = zRight + d;  

        ptsR[7].x = (float)(pos->x + w);  
        ptsR[7].y = (float)pos->y;
        ptsR[7].z = zRight;

        *pos = posPrev;

    }

    if (flags & BLOCK_TOP) {
        mesh->faces[faceCount].material = curMatl;
        ss_calcNorm(&mesh->faces[faceCount].norm, &pts[0], &pts[1], &pts[2]);
        if (flags & DELTA_BLEND) {
            ss_calcNorm(&norms[0], &ptsL[0], &ptsL[1], &ptsL[2]);
            ss_calcNorm(&norms[1], &ptsR[0], &ptsR[1], &ptsR[2]);
        }
        BLOCK_VERTEX(0, 0);
        BLOCK_VERTEX(1, 1);
        BLOCK_VERTEX(2, 2);
        BLOCK_VERTEX(3, 3);
        faceCount++;
        mesh->numFaces++;
    }

    if (flags & BLOCK_BOTTOM) {
        mesh->faces[faceCount].material = curMatl;
        ss_calcNorm(&mesh->faces[faceCount].norm, &pts[4], &pts[7], &pts[6]);
        if (flags & DELTA_BLEND) {
            ss_calcNorm(&norms[0], &ptsL[4], &ptsL[7], &ptsL[6]);
            ss_calcNorm(&norms[1], &ptsR[4], &ptsR[7], &ptsR[6]);
        }
        BLOCK_VERTEX(0, 4);
        BLOCK_VERTEX(1, 7);
        BLOCK_VERTEX(2, 6);
        BLOCK_VERTEX(3, 5);
        faceCount++;
        mesh->numFaces++;
    }

    if (flags & BLOCK_LEFT) {
        mesh->faces[faceCount].material = curMatl;
        ss_calcNorm(&mesh->faces[faceCount].norm, &pts[1], &pts[0], &pts[4]);
        if (flags & DELTA_BLEND) {
            ss_calcNorm(&norms[0], &ptsL[1], &ptsL[0], &ptsL[4]);
            ss_calcNorm(&norms[1], &ptsR[1], &ptsR[0], &ptsR[4]);
        }
        BLOCK_VERTEX(0, 1);
        BLOCK_VERTEX(1, 0);
        BLOCK_VERTEX(2, 4);
        BLOCK_VERTEX(3, 5);
        faceCount++;
        mesh->numFaces++;
    }

    if (flags & BLOCK_RIGHT) {
        mesh->faces[faceCount].material = curMatl;
        ss_calcNorm(&mesh->faces[faceCount].norm, &pts[3], &pts[2], &pts[6]);
        if (flags & DELTA_BLEND) {
            ss_calcNorm(&norms[0], &ptsL[3], &ptsL[2], &ptsL[6]);
            ss_calcNorm(&norms[1], &ptsR[3], &ptsR[2], &ptsR[6]);
        }
        BLOCK_VERTEX(0, 3);
        BLOCK_VERTEX(1, 2);
        BLOCK_VERTEX(2, 6);
        BLOCK_VERTEX(3, 7);
        faceCount++;
        mesh->numFaces++;
    }

    if (flags & BLOCK_FRONT) {
        mesh->faces[faceCount].material = curMatl;
        ss_calcNorm(&mesh->faces[faceCount].norm, &pts[0], &pts[3], &pts[7]);
        if (flags & DELTA_BLEND) {
            ss_calcNorm(&norms[0], &ptsL[0], &ptsL[3], &ptsL[7]);
            ss_calcNorm(&norms[1], &ptsR[0], &ptsR[3], &ptsR[7]);
        }
        BLOCK_VERTEX(0, 0);
        BLOCK_VERTEX(1, 3);
        BLOCK_VERTEX(2, 7);
        BLOCK_VERTEX(3, 4);
        faceCount++;
        mesh->numFaces++;
    }

    if (flags & BLOCK_BACK) {
        mesh->faces[faceCount].material = curMatl;
        ss_calcNorm(&mesh->faces[faceCount].norm, &pts[1], &pts[5], &pts[6]);
        if (flags & DELTA_BLEND) {
            ss_calcNorm(&norms[0], &ptsL[1], &ptsL[5], &ptsL[6]);
            ss_calcNorm(&norms[1], &ptsR[1], &ptsR[5], &ptsR[6]);
        }
        BLOCK_VERTEX(0, 1);
        BLOCK_VERTEX(1, 5);
        BLOCK_VERTEX(2, 6);
        BLOCK_VERTEX(3, 2);
        mesh->numFaces++;
    }

}




BOOL genWin(MESH *winMesh, MESH *winStreamer)
{
    POINT3D pos, posCenter;
    float w, h, d;
    float wMax, hMax;
    float xpos;
    int i, j, prec;
    int startBlend;

    if( !newMesh(winMesh, CUBE_FACES * iPrec * 20, CUBE_POINTS * iPrec * 20) )
        return FALSE;

    //
    // create window frame
    //

    w = (WIN_WIDTH - WIN_TOP_BORDER) / (float)iPrec;
    h = (float)WIN_TOP_BORDER;
    d = (float)WIN_THICKNESS;

    // draw top and bottom portions

    pos.y = 0.0f;
    pos.z = 0.0f;

    for (i = 0, pos.x = xTrans, startBlend = winMesh->numPoints;
         i < iPrec; i++, pos.x += w)
        AddBlock(winMesh, startBlend, &pos, w, h, d, BLOCK_TOP);
    for (i = 0, pos.x = xTrans, startBlend = winMesh->numPoints;
         i < iPrec; i++, pos.x += w)
        AddBlock(winMesh, startBlend, &pos, w, h, d, BLOCK_BOTTOM);
    for (i = 0, pos.x = xTrans, startBlend = winMesh->numPoints; 
         i < iPrec; i++, pos.x += w)
        AddBlock(winMesh, startBlend, &pos, w, h, d, BLOCK_FRONT);
    for (i = 0, pos.x = xTrans, startBlend = winMesh->numPoints;
         i < iPrec; i++, pos.x += w)
        AddBlock(winMesh, startBlend, &pos, w, h, d, BLOCK_BACK);
    pos.x = xTrans;
    AddBlock(winMesh, 0, &pos, w, h, d, BLOCK_LEFT | NO_BLEND);

    pos.y = WIN_HEIGHT - WIN_TOP_BORDER;
    pos.z = 0.0f;

    for (i = 0, pos.x = xTrans, startBlend = winMesh->numPoints;
         i < iPrec; i++, pos.x += w)
        AddBlock(winMesh, startBlend, &pos, w, h, d, BLOCK_TOP);
    for (i = 0, pos.x = xTrans, startBlend = winMesh->numPoints;
         i < iPrec; i++, pos.x += w)
        AddBlock(winMesh, startBlend, &pos, w, h, d, BLOCK_BOTTOM);
    for (i = 0, pos.x = xTrans, startBlend = winMesh->numPoints;
         i < iPrec; i++, pos.x += w)
        AddBlock(winMesh, startBlend, &pos, w, h, d, BLOCK_FRONT);
    for (i = 0, pos.x = xTrans, startBlend = winMesh->numPoints;
         i < iPrec; i++, pos.x += w)
        AddBlock(winMesh, startBlend, &pos, w, h, d, BLOCK_BACK);
    pos.x = xTrans;
    AddBlock(winMesh, 0, &pos, w, h, d, BLOCK_LEFT | NO_BLEND);
    
    // draw middle horizontal portions

    prec = (iPrec / 2);
    w = (WIN_WIDTH - WIN_TOP_BORDER - WIN_CROSSBAR) / 2.0f;
    w /= (float)prec;
    h = WIN_CROSSBAR;
    pos.y = (WIN_HEIGHT - WIN_CROSSBAR) / 2.0f;
    pos.z = 0.0f;

    for (i = 0, pos.x = xTrans, startBlend = winMesh->numPoints;
         i < prec; i++, pos.x += w)
        AddBlock(winMesh, startBlend, &pos, w, h, d, BLOCK_TOP);
    for (i = 0, pos.x = xTrans, startBlend = winMesh->numPoints;
         i < prec; i++, pos.x += w)
        AddBlock(winMesh, startBlend, &pos, w, h, d, BLOCK_BOTTOM);
    for (i = 0, pos.x = xTrans, startBlend = winMesh->numPoints;
         i < prec; i++, pos.x += w)
        AddBlock(winMesh, startBlend, &pos, w, h, d, BLOCK_FRONT);
    for (i = 0, pos.x = xTrans, startBlend = winMesh->numPoints;
         i < prec; i++, pos.x += w)
        AddBlock(winMesh, startBlend, &pos, w, h, d, BLOCK_BACK);

    xpos = pos.x + WIN_CROSSBAR;

    for (i = 0, pos.x = xpos, startBlend = winMesh->numPoints;
         i < prec; i++, pos.x += w)
        AddBlock(winMesh, startBlend, &pos, w, h, d, BLOCK_TOP);
    for (i = 0, pos.x = xpos, startBlend = winMesh->numPoints;
         i < prec; i++, pos.x += w)
        AddBlock(winMesh, startBlend, &pos, w, h, d, BLOCK_BOTTOM);
    for (i = 0, pos.x = xpos, startBlend = winMesh->numPoints;
         i < prec; i++, pos.x += w)
        AddBlock(winMesh, startBlend, &pos, w, h, d, BLOCK_FRONT);
    for (i = 0, pos.x = xpos, startBlend = winMesh->numPoints;
         i < prec; i++, pos.x += w)
        AddBlock(winMesh, startBlend, &pos, w, h, d, BLOCK_BACK);

    pos.x = xTrans;
    AddBlock(winMesh, 0, &pos, w, h, d, BLOCK_LEFT | NO_BLEND);


    // Draw thick right-hand edge of frame

    pos.x = xpos = xTrans + WIN_WIDTH - WIN_RIGHT_BORDER;
    pos.y = 0.0f;
    pos.z = 0.0f;
    w = WIN_RIGHT_BORDER / (float)S_IPREC;
    h = WIN_HEIGHT;

    AddBlock(winMesh, winMesh->numPoints, &pos, w, h, d, BLOCK_LEFT);

    for (i = 0, pos.x = xpos, startBlend = winMesh->numPoints;
         i < S_IPREC; i++, pos.x += w)
        AddBlock(winMesh, startBlend, &pos, w, h, d, BLOCK_FRONT);
    for (i = 0, pos.x = xpos, startBlend = winMesh->numPoints;
         i < S_IPREC; i++, pos.x += w)
        AddBlock(winMesh, startBlend, &pos, w, h, d, BLOCK_BACK);
    for (i = 0, pos.x = xpos, startBlend = winMesh->numPoints;
         i < S_IPREC; i++, pos.x += w)
        AddBlock(winMesh, startBlend, &pos, w, h, d, BLOCK_TOP);
    pos.y = WIN_HEIGHT;
    for (i = 0, pos.x = xpos, startBlend = winMesh->numPoints;
         i < S_IPREC; i++, pos.x += w)
        AddBlock(winMesh, startBlend, &pos, w, h, d, BLOCK_BOTTOM);

    pos.y = 0.0f;
    pos.x = xTrans + WIN_WIDTH - w;
    AddBlock(winMesh, winMesh->numPoints, &pos, w, h, d, BLOCK_RIGHT);

    // draw middle-vertical portion of frame

    pos.x = xTrans + (WIN_WIDTH - WIN_RIGHT_BORDER) / 2.0f - (WIN_CROSSBAR / 2.0f);
    pos.y = WIN_TOP_BORDER;
    pos.z = 0.0f;
    w = WIN_CROSSBAR;
    h = WIN_HEIGHT - 2.0f * WIN_TOP_BORDER;
    AddBlock(winMesh, 0, &pos, w, h, d, BLOCK_ALL | NO_BLEND);

    //
    // add the panels
    //

    w = (WIN_WIDTH - WIN_RIGHT_BORDER - WIN_CROSSBAR) / 2.0f;
    h = (WIN_HEIGHT - 2.0f * WIN_TOP_BORDER - WIN_CROSSBAR) / 2.0f;

    w /= (float)(iPrec / 2);

    curMatl = 2;
    pos.x = xTrans;
    pos.y = WIN_TOP_BORDER;
    for (i = 0, startBlend = winMesh->numPoints; i < iPrec / 2; i++) {
        AddFace(winMesh, startBlend, &pos, w, h);
        pos.x += w;
    }
    curMatl = 4;
    pos.x += WIN_CROSSBAR;
    for (i = 0, startBlend = winMesh->numPoints; i < iPrec / 2; i++) {
        AddFace(winMesh, startBlend, &pos, w, h);
        pos.x += w;
    }

    curMatl = 1;
    pos.x = xTrans;
    pos.y = WIN_TOP_BORDER + h + WIN_CROSSBAR;
    for (i = 0, startBlend = winMesh->numPoints; i < iPrec / 2; i++) {
        AddFace(winMesh, startBlend, &pos, w, h);
        pos.x += w;
    }
    curMatl = 3;
    pos.x += WIN_CROSSBAR;
    for (i = 0, startBlend = winMesh->numPoints; i < iPrec / 2; i++) {
        AddFace(winMesh, startBlend, &pos, w, h);
        pos.x += w;
    }

    ss_normalizeNorms(winMesh->norms, winMesh->numPoints);

    if( !newMesh(winStreamer, CUBE_FACES * WIN_NUMPIECES * WIN_NUMCOLUMNS,
            CUBE_POINTS * WIN_NUMPIECES * WIN_NUMCOLUMNS) )
    {
        return FALSE;
    }

    h = hMax = WIN_TOP_BORDER;
    w = wMax = WIN_TOP_BORDER * 1.1f;

    posCenter.x = pos.x = xTrans - wMax - WIN_GAP_X;
    posCenter.y = pos.y = 0.0f;

    for (i = 0; i < WIN_NUMCOLUMNS; i++) {
        for (j = 0; j < WIN_NUMPIECES; j++) {
            if (((j % 3) == 0) || (i == 0))
                curMatl = 0;
            else if (j < 3)
                curMatl = 2;
            else
                curMatl = 1;
            AddBlock(winStreamer, 0, &pos, w, h, d, BLOCK_ALL);
            pos.y += (hMax + WIN_GAP);
        }

        posCenter.x -= (wMax + WIN_GAP_X);
        posCenter.y = 0.0f;

        h = h * 0.8f;
        w = w * 0.8f;

        pos.x = posCenter.x;
        pos.y = posCenter.y;

        pos.x += (wMax - w) / 2.0f;
        pos.y += (hMax - h) / 2.0f;
    }    
    ss_normalizeNorms(winStreamer->norms, winStreamer->numPoints);

    return TRUE;
}




BOOL initWinScene()
{
    int i;
    float angleDelta;

    iPrec = (int)(fTesselFact * 10.5);
    if (iPrec < 5)
        iPrec = 5;
    if (iPrec > MAXPREC)
        iPrec = MAXPREC;
/*
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    glOrtho(-1.0, 1.0, -0.75, 1.25, 0.0, 3.0);
*/
    SetProjectionMatrixInfo( TRUE, 2.0f, 2.0f, 0.0f, 3.0f );

/*
    glTranslatef(0.0f, 0.0f, -1.5f);
*/
    D3DXMATRIX matView1, matReverseX, matView2;
    D3DXVECTOR3 vUpVec( 0.0f, 1.0f, 0.0f );
    D3DXVECTOR3 vEyePt(0, 0, 1.5f);
    D3DXVECTOR3 vLookatPt(0, 0, 0);
    D3DXMatrixLookAtLH( &matView1, &vEyePt, &vLookatPt, &vUpVec );
    D3DXMatrixScaling( &matReverseX, -1.0f, 1.0f, 1.0f );
    matView2 = matView1 * matReverseX;
    m_pd3dDevice->SetTransform( D3DTS_VIEW, &matView2 );

    // Light 0
    D3DLIGHT8 light;
    m_pd3dDevice->GetLight(0, &light);
    light.Position.x = light0Pos[0];
    light.Position.y = light0Pos[1];
    light.Position.z = light0Pos[2];
    m_pd3dDevice->SetLight(0, &light);

    // Light 1
    light.Type = D3DLIGHT_POINT;
    light.Ambient.r = light1Ambient.r;
    light.Ambient.g = light1Ambient.g;
    light.Ambient.b = light1Ambient.b;
    light.Ambient.a = light1Ambient.a;
    light.Diffuse.r = light1Diffuse.r;
    light.Diffuse.g = light1Diffuse.g;
    light.Diffuse.b = light1Diffuse.b;
    light.Diffuse.a = light1Diffuse.a;
    light.Specular.r = light1Specular.r;
    light.Specular.g = light1Specular.g;
    light.Specular.b = light1Specular.b;
    light.Specular.a = light1Specular.a;
    light.Position.x = light1Pos[0];
    light.Position.y = light1Pos[1];
    light.Position.z = light1Pos[2];
    m_pd3dDevice->SetLight(1, &light);
    m_pd3dDevice->LightEnable(1, TRUE);
    
/*
    glMatrixMode(GL_MODELVIEW);

    glFrontFace(GL_CCW);
    glEnable(GL_CULL_FACE);
*/
    
    m_pd3dDevice->SetRenderState( D3DRS_CULLMODE, D3DCULL_NONE );

    Frames = (int)((float)(MAX_FRAMES / 2) * fTesselFact);

    if (Frames < 5)
        Frames = 5;
    if (Frames > MAX_FRAMES)
        Frames = MAX_FRAMES;

    angleDelta = (float) ((2.0 * PI) / Frames);
    sinAngle = 0.0f;

    for (i = 0; i < Frames; i++) {
        if( !genWin(&winMesh[i], &winStreamer[i]) )
            return FALSE;
        sinAngle += angleDelta;
    }
    return TRUE;
}




void delWinScene()
{
    int i;

    for (i = 0; i < Frames; i++) {
        delMesh(&winMesh[i]);
        delMesh(&winStreamer[i]);
    }
}




void updateWinScene(int flags, FLOAT fElapsedTime)
{
    MESH *mesh;
    static double mxrot = 23.0;
    static double myrot = 23.0;
    static double mzrot = 5.7;
    static double mxrotInc = 0.0;
    static double myrotInc = 3.0;
    static double mzrotInc = 0.0;
    static FLOAT fH = 0.0f;
    static int frameNum = 0;
    static FLOAT fFrameNum = 0.0f;
    if( fElapsedTime > 0.25f )
        fElapsedTime = 0.25f;
    FLOAT fTimeFactor = fElapsedTime * 20.0f;
    D3DXMATRIX mat1, mat2, mat3, matFinal;

    if (bColorCycle) {
        ss_HsvToRgb(fH, 1.0f, 1.0f, &winColors[0] );

        fH += fTimeFactor;
        if( fH >= 360.0f )
            fH -= 360.0f;
    }

    D3DXMatrixRotationX(&mat1, D3DXToRadian((FLOAT)mxrot));
    D3DXMatrixRotationY(&mat2, D3DXToRadian((FLOAT)myrot));
    D3DXMatrixRotationZ(&mat3, D3DXToRadian((FLOAT)mzrot));
    matFinal = mat3 * mat2 * mat1 ;
    m_pd3dDevice->SetTransform( D3DTS_WORLD , &matFinal );

    curMatl = 0;

    myglMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, (FLOAT *) &winColors[0]);
    myglMaterialfv(GL_FRONT, GL_SPECULAR, (FLOAT *) &matlBrightSpecular);
    myglMaterialf(GL_FRONT, GL_SHININESS, 60.0f);

    mesh = &winMesh[frameNum];

    {
        HRESULT hr;
        MESH* pMesh = mesh;
        INT numPrims = 0;
        INT numIndices = 0;
        INT numVertices = 0;
        WORD* i;
        MYVERTEX* v;
        hr = m_pVB->Lock( 0, 0, (BYTE**)&v, 0 );
        hr = m_pIB->Lock( 0, MAX_INDICES, (BYTE**)&i, 0 );

        m_pd3dDevice->SetVertexShader( D3DFVF_MYVERTEX );

        for( int iFace = 0; iFace < pMesh->numFaces; iFace++ )
        {
            if (pMesh->faces[iFace].material != curMatl) 
            {
                hr = m_pVB->Unlock();
                hr = m_pIB->Unlock();

                hr = m_pd3dDevice->SetStreamSource( 0, m_pVB, sizeof(MYVERTEX) );
                hr = m_pd3dDevice->SetIndices( m_pIB, 0 );

                hr = m_pd3dDevice->DrawIndexedPrimitive( D3DPT_TRIANGLELIST, 0, numVertices, 
                    0, numPrims );
                numVertices = 0;
                numIndices = 0;
                numPrims = 0;
                hr = m_pVB->Lock( 0, 0, (BYTE**)&v, 0 );
                hr = m_pIB->Lock( 0, MAX_INDICES, (BYTE**)&i, 0 );

                curMatl = pMesh->faces[iFace].material;
                myglMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR,
                             (FLOAT *) &matlNoSpecular);
                myglMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, 
                             (FLOAT *) &winColors[curMatl]);
    
            }
            v[numVertices+0].p = pMesh->pts[ pMesh->faces[iFace].p[0] ];
            v[numVertices+1].p = pMesh->pts[ pMesh->faces[iFace].p[1] ];
            v[numVertices+2].p = pMesh->pts[ pMesh->faces[iFace].p[2] ];
            v[numVertices+3].p = pMesh->pts[ pMesh->faces[iFace].p[3] ];

            if( bSmoothShading )
            {
                v[numVertices+0].n = pMesh->norms[ pMesh->faces[iFace].p[0] ];
                v[numVertices+1].n = pMesh->norms[ pMesh->faces[iFace].p[1] ];
                v[numVertices+2].n = pMesh->norms[ pMesh->faces[iFace].p[2] ];
                v[numVertices+3].n = pMesh->norms[ pMesh->faces[iFace].p[3] ];
            }
            else
            {
                v[numVertices+0].n = pMesh->faces[iFace].norm;
                v[numVertices+1].n = pMesh->faces[iFace].norm;
                v[numVertices+2].n = pMesh->faces[iFace].norm;
                v[numVertices+3].n = pMesh->faces[iFace].norm;
            }

            i[numIndices++] = numVertices + 0;
            i[numIndices++] = numVertices + 1;
            i[numIndices++] = numVertices + 2;
            i[numIndices++] = numVertices + 2;
            i[numIndices++] = numVertices + 0;
            i[numIndices++] = numVertices + 3;
            numVertices += 4;
            numPrims += 2;
        }
        hr = m_pVB->Unlock();
        hr = m_pIB->Unlock();

        hr = m_pd3dDevice->SetStreamSource( 0, m_pVB, sizeof(MYVERTEX) );
        hr = m_pd3dDevice->SetIndices( m_pIB, 0 );

        hr = m_pd3dDevice->DrawIndexedPrimitive( D3DPT_TRIANGLELIST, 0, numVertices, 
            0, numPrims );
    }

    myglMaterialfv(GL_FRONT, GL_SPECULAR, (FLOAT *) &matlDimSpecular);

    mesh = &winStreamer[frameNum];

    {
        HRESULT hr;
        MESH* pMesh = mesh;
        INT numPrims = 0;
        INT numIndices = 0;
        INT numVertices = 0;
        WORD* i;
        MYVERTEX* v;
        hr = m_pVB->Lock( 0, 0, (BYTE**)&v, 0 );
        hr = m_pIB->Lock( 0, MAX_INDICES, (BYTE**)&i, 0 );

        m_pd3dDevice->SetVertexShader( D3DFVF_MYVERTEX );

        for( int iFace = 0; iFace < pMesh->numFaces; iFace++ )
        {
            if (pMesh->faces[iFace].material != curMatl) 
            {
                hr = m_pVB->Unlock();
                hr = m_pIB->Unlock();

                hr = m_pd3dDevice->SetStreamSource( 0, m_pVB, sizeof(MYVERTEX) );
                hr = m_pd3dDevice->SetIndices( m_pIB, 0 );

                hr = m_pd3dDevice->DrawIndexedPrimitive( D3DPT_TRIANGLELIST, 0, numVertices, 
                    0, numPrims );

                numVertices = 0;
                numIndices = 0;
                numPrims = 0;
                hr = m_pVB->Lock( 0, 0, (BYTE**)&v, 0 );
                hr = m_pIB->Lock( 0, MAX_INDICES, (BYTE**)&i, 0 );

                curMatl = pMesh->faces[iFace].material;
                myglMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, 
                             (FLOAT *) &winColors[curMatl]);
    
            }
            v[numVertices+0].p = pMesh->pts[ pMesh->faces[iFace].p[0] ];
            v[numVertices+1].p = pMesh->pts[ pMesh->faces[iFace].p[1] ];
            v[numVertices+2].p = pMesh->pts[ pMesh->faces[iFace].p[2] ];
            v[numVertices+3].p = pMesh->pts[ pMesh->faces[iFace].p[3] ];

            v[numVertices+0].n = pMesh->faces[iFace].norm;
            v[numVertices+1].n = pMesh->faces[iFace].norm;
            v[numVertices+2].n = pMesh->faces[iFace].norm;
            v[numVertices+3].n = pMesh->faces[iFace].norm;

            i[numIndices++] = numVertices + 0;
            i[numIndices++] = numVertices + 1;
            i[numIndices++] = numVertices + 2;
            i[numIndices++] = numVertices + 2;
            i[numIndices++] = numVertices + 0;
            i[numIndices++] = numVertices + 3;
            numVertices += 4;
            numPrims += 2;
        }
        hr = m_pVB->Unlock();
        hr = m_pIB->Unlock();

        hr = m_pd3dDevice->SetStreamSource( 0, m_pVB, sizeof(MYVERTEX) );
        hr = m_pd3dDevice->SetIndices( m_pIB, 0 );

        hr = m_pd3dDevice->DrawIndexedPrimitive( D3DPT_TRIANGLELIST, 0, numVertices, 
            0, numPrims );
    }

    mxrot += mxrotInc * fTimeFactor;
    myrot += myrotInc * fTimeFactor;
    mzrot += mzrotInc * fTimeFactor;

    if ((myrot < -45.0 && myrotInc < 0) || (myrot > 45.0 && myrotInc > 0))
        myrotInc = -myrotInc;

    fFrameNum += fTimeFactor;
    frameNum = (INT)fFrameNum;
    if (frameNum >= Frames)
    {
        frameNum = 0;
        fFrameNum -= Frames; 
    }
}