185 lines
7.3 KiB
HTML
185 lines
7.3 KiB
HTML
<!DOCTYPE html>
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<meta name="vsisbn" content="1576101746" />
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<meta name="vstitle" content="Michael Abrash's Graphics Programming Black Book, Special Edition" />
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<meta name="vsauthor" content="Michael Abrash" />
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<meta name="vspublisher" content="The Coriolis Group" />
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<meta name="vspubdate" content="07/01/97" />
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<meta name="vscategory" content="Web and Software Development: Game Development,Web and Software Development: Graphics and Multimedia Development" />
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<title>Michael Abrash's Graphics Programming Black Book Special Edition: Fast 3-D Animation: Meet X-Sharp</title>
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<meta name="chapter" content="52" />
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<meta name="pages" content="979-981" />
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<body>
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<center>
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<a href="52-04.html">Previous</a>
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<a href="index.html">Table of Contents</a>
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<a href="52-06.html">Next</a>
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<p><b>LISTING 52.8 L52-8.C</b></p>
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<pre>
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/* Initializes the cubes and adds them to the object list. */
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#include <stdlib.h>
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#include <math.h>
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#include “polygon.h”
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#define ROT_6 (M_PI / 30.0) /* rotate 6 degrees at a time */
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#define ROT_3 (M_PI / 60.0) /* rotate 3 degrees at a time */
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#define ROT_2 (M_PI / 90.0) /* rotate 2 degrees at a time */
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#define NUM_CUBES 12 /* # of cubes */
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Point3 CubeVerts[NUM_CUBE_VERTS]; /* set elsewhere, from floats */
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/* vertex indices for individual cube faces */
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static int Face1[] = {1,3,2,0};
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static int Face2[] = {5,7,3,1};
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static int Face3[] = {4,5,1,0};
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static int Face4[] = {3,7,6,2};
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static int Face5[] = {5,4,6,7};
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static int Face6[] = {0,2,6,4};
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static int *VertNumList[]={Face1, Face2, Face3, Face4, Face5, Face6};
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static int VertsInFace[]={ sizeof(Face1)/sizeof(int),
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sizeof(Face2)/sizeof(int), sizeof(Face3)/sizeof(int),
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sizeof(Face4)/sizeof(int), sizeof(Face5)/sizeof(int),
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sizeof(Face6)/sizeof(int) };
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/* X, Y, Z rotations for cubes */
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static RotateControl InitialRotate[NUM_CUBES] = {
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{0.0,ROT_6,ROT_6},{ROT_3,0.0,ROT_3},{ROT_3,ROT_3,0.0},
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{ROT_3,-ROT_3,0.0},{-ROT_3,ROT_2,0.0},{-ROT_6,-ROT_3,0.0},
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{ROT_3,0.0,-ROT_6},{-ROT_2,0.0,ROT_3},{-ROT_3,0.0,-ROT_3},
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{0.0,ROT_2,-ROT_2},{0.0,-ROT_3,ROT_3},{0.0,-ROT_6,-ROT_6},};
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static MoveControl InitialMove[NUM_CUBES] = {
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{0,0,80,0,0,0,0,0,-350},{0,0,80,0,0,0,0,0,-350},
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{0,0,80,0,0,0,0,0,-350},{0,0,80,0,0,0,0,0,-350},
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{0,0,80,0,0,0,0,0,-350},{0,0,80,0,0,0,0,0,-350},
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{0,0,80,0,0,0,0,0,-350},{0,0,80,0,0,0,0,0,-350},
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{0,0,80,0,0,0,0,0,-350},{0,0,80,0,0,0,0,0,-350},
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{0,0,80,0,0,0,0,0,-350},{0,0,80,0,0,0,0,0,-350}, };
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/* face colors for various cubes */
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static int Colors[NUM_CUBES][NUM_CUBE_FACES] = {
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{15,14,12,11,10,9},{1,2,3,4,5,6},{35,37,39,41,43,45},
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{47,49,51,53,55,57},{59,61,63,65,67,69},{71,73,75,77,79,81},
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{83,85,87,89,91,93},{95,97,99,101,103,105},
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{107,109,111,113,115,117},{119,121,123,125,127,129},
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{131,133,135,137,139,141},{143,145,147,149,151,153} };
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/* starting coordinates for cubes in world space */
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static int CubeStartCoords[NUM_CUBES][3] = {
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{100,0,-6000}, {100,70,-6000}, {100,-70,-6000}, {33,0,-6000},
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{33,70,-6000}, {33,-70,-6000}, {-33,0,-6000}, {-33,70,-6000},
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{-33,-70,-6000},{-100,0,-6000}, {-100,70,-6000}, {-100,-70,-6000}};
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/* delay counts (speed control) for cubes */
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static int InitRDelayCounts[NUM_CUBES] = {1,2,1,2,1,1,1,1,1,2,1,1};
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static int BaseRDelayCounts[NUM_CUBES] = {1,2,1,2,2,1,1,1,2,2,2,1};
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static int InitMDelayCounts[NUM_CUBES] = {1,1,1,1,1,1,1,1,1,1,1,1};
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static int BaseMDelayCounts[NUM_CUBES] = {1,1,1,1,1,1,1,1,1,1,1,1};
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void InitializeCubes()
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{
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int i, j, k;
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PObject *WorkingCube;
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for (i=0; i<NUM_CUBES; i++) {
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if ((WorkingCube = malloc(sizeof(PObject))) == NULL) {
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printf(“Couldn't get memory\n”); exit(1); }
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WorkingCube->DrawFunc = DrawPObject;
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WorkingCube->RecalcFunc = XformAndProjectPObject;
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WorkingCube->MoveFunc = RotateAndMovePObject;
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WorkingCube->RecalcXform = 1;
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for (k=0; k<2; k++) {
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WorkingCube->EraseRect[k].Left =
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WorkingCube->EraseRect[k].Top = 0x7FFF;
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WorkingCube->EraseRect[k].Right = 0;
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WorkingCube->EraseRect[k].Bottom = 0;
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}
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WorkingCube->RDelayCount = InitRDelayCounts[i];
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WorkingCube->RDelayCountBase = BaseRDelayCounts[i];
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WorkingCube->MDelayCount = InitMDelayCounts[i];
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WorkingCube->MDelayCountBase = BaseMDelayCounts[i];
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/* Set the object->world xform to none */
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for (j=0; j<3; j++)
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for (k=0; k<4; k++)
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WorkingCube->XformToWorld[j][k] = INT_TO_FIXED(0);
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WorkingCube->XformToWorld[0][0] =
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WorkingCube->XformToWorld[1][1] =
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WorkingCube->XformToWorld[2][2] =
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WorkingCube->XformToWorld[3][3] = INT_TO_FIXED(1);
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/* Set the initial location */
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for (j=0; j<3; j++) WorkingCube->XformToWorld[j][3] =
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INT_TO_FIXED(CubeStartCoords[i][j]);
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WorkingCube->NumVerts = NUM_CUBE_VERTS;
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WorkingCube->VertexList = CubeVerts;
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WorkingCube->NumFaces = NUM_CUBE_FACES;
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WorkingCube->Rotate = InitialRotate[i];
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WorkingCube->Move.MoveX = INT_TO_FIXED(InitialMove[i].MoveX);
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WorkingCube->Move.MoveY = INT_TO_FIXED(InitialMove[i].MoveY);
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WorkingCube->Move.MoveZ = INT_TO_FIXED(InitialMove[i].MoveZ);
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WorkingCube->Move.MinX = INT_TO_FIXED(InitialMove[i].MinX);
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WorkingCube->Move.MinY = INT_TO_FIXED(InitialMove[i].MinY);
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WorkingCube->Move.MinZ = INT_TO_FIXED(InitialMove[i].MinZ);
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WorkingCube->Move.MaxX = INT_TO_FIXED(InitialMove[i].MaxX);
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WorkingCube->Move.MaxY = INT_TO_FIXED(InitialMove[i].MaxY);
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WorkingCube->Move.MaxZ = INT_TO_FIXED(InitialMove[i].MaxZ);
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if ((WorkingCube->XformedVertexList =
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malloc(NUM_CUBE_VERTS*sizeof(Point3))) == NULL) {
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printf(“Couldn't get memory\n”); exit(1); }
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if ((WorkingCube->ProjectedVertexList =
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malloc(NUM_CUBE_VERTS*sizeof(Point3))) == NULL) {
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printf(“Couldn't get memory\n”); exit(1); }
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if ((WorkingCube->ScreenVertexList =
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malloc(NUM_CUBE_VERTS*sizeof(Point))) == NULL) {
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printf(“Couldn't get memory\n”); exit(1); }
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if ((WorkingCube->FaceList =
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malloc(NUM_CUBE_FACES*sizeof(Face))) == NULL) {
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printf(“Couldn't get memory\n”); exit(1); }
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/* Initialize the faces */
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for (j=0; j<NUM_CUBE_FACES; j++) {
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WorkingCube->FaceList[j].VertNums = VertNumList[j];
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WorkingCube->FaceList[j].NumVerts = VertsInFace[j];
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WorkingCube->FaceList[j].Color = Colors[i][j];
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}
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ObjectList[NumObjects++] = (Object *)WorkingCube;
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}
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}
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</pre>
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<center>
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<table border="1">
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<tr>
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<td>
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<a href="52-04.html">Previous</a>
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</td>
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<td>
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<a href="index.html">Table of Contents</a>
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</td>
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<td>
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<a href="52-06.html">Next</a>
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</td>
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</center>
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<hr width="90%" size="1" noshade="noshade" />
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<div align="center">
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Graphics Programming Black Book © 2001 Michael Abrash
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</div>
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</body>
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