|
|
| #include <unistd.h> |
| #include <stdlib.h> |
| #include <stdio.h> |
| #include <math.h> |
| #include <sys/times.h> |
|
|
| #include "pkvaria.h" |
| #include "pknum.h" |
| #include "pkgeom.h" |
| #include "multibs.h" |
| #include "raybez.h" |
| #include "camera.h" |
| #include "psout.h" |
|
|
| char fn[] = "testraybsf.ps"; |
|
|
| int n = 3, m = 3; |
| int lknu = 10, lknv = 10; |
| float knots_u[11] = {-0.5, 0.0, 0.0, 0.0, 1.0, 2.0, 3.0, 4.0, 4.0, 4.0, 4.5}; |
| float knots_v[11] = {-0.5, 0.0, 0.0, 0.0, 1.0, 2.5, 2.5, 4.0, 4.0, 4.0, 4.5}; |
| point3f cpoints[] = |
| {{-3.0,-3.0,-0.5}, {-2.7,-3.0,-0.5}, {-1.5,-3.0,-0.5}, {0.0,-3.0,-0.5}, |
| {1.5,-3.0,-0.5}, {2.7,-3.0,-0.5}, {3.0,-3.0,-0.5}, |
| {-3.0,-2.7}, {-2.7,-2.7}, {-1.5,-2.7}, {0.0,-2.7}, {1.5,-2.7}, |
| {2.7,-2.7}, {3.0,-2.7}, |
| {-3.0,-1.5,0.1}, {-2.7,-1.5,0.1}, {-1.5,-1.5,0.1}, {0.0,-1.5,0.1}, |
| {1.5,-1.5,2.5}, {2.7,-1.5,0.1}, {3.0,-1.5,0.1}, |
| {-3.0,0.0,0.2}, {-2.7,0.0,0.2}, {-1.5,0.0,0.2}, {0.0,0.0,0.2}, |
| {1.5,0.0,0.2}, {2.7,0.0,0.2}, {3.0,0.0,0.2}, |
| {-3.0,1.5,0.1}, {-2.7,1.5,0.1}, {-1.5,1.5,0.1}, {0.0,1.5,0.1}, |
| {1.5,1.5,0.1}, {2.7,1.5,0.1}, {3.0,1.5,0.1}, |
| {-3.0,2.7}, {-2.7,2.7}, {-1.5,2.7}, {0.0,2.7}, {1.5,2.7}, {2.7,2.7}, |
| {3.0,2.7}, |
| {-3.0,3.0,-0.5}, {-2.7,3.0,-0.5}, {-1.5,3.0,-0.5}, {0.0,3.0,-0.5}, |
| {1.5,3.0,-0.5}, {2.7,3.0,-0.5}, {3.0,3.0,-0.5}}; |
|
|
| #define WIDTH 640 |
| #define HEIGHT 480 |
|
|
| CameraRecf CPos; |
| vector3f ld; |
|
|
| BezPatchTreefp tree; |
|
|
| static void SetCPos ( void ) |
| { |
| CameraInitFramef ( &CPos, false, false, WIDTH, HEIGHT, 0, 0, 1.0, 4 ); |
| CameraInitPosf ( &CPos ); |
| SetPoint3f ( &CPos.position, -15.31251039605, -72.93132382473, 49.231894764605 ); |
| CPos.psi = 2.963570202665; |
| CPos.theta = 2.1560152051; |
| CPos.phi = 2.934640744727; |
| CPos.vd.persp.f = 10.0; |
| CameraSetMappingf ( &CPos ); |
| } |
|
|
| static void SetLightDir ( void ) |
| { |
| SetVector3f ( &ld, 0.5, 0.5, -1.0 ); |
| NormalizeVector3f ( &ld ); |
| } |
|
|
| static byte PixelColour ( ray3f *ray ) |
| { |
| #define MAXLEVEL 16 |
| #define MAXINTERS 10 |
| RayObjectIntersf inters[MAXINTERS]; |
| int ninters, i, j; |
| float tmin; |
| float gray, g0, l0; |
|
|
| rbez_FindRayBezPatchIntersf ( tree, ray, MAXLEVEL, MAXINTERS, |
| &ninters, inters ); |
| if ( ninters ) { |
| if ( ninters > 1 ) { |
| j = 0; |
| tmin = inters[0].t; |
| for ( i = 0; i < ninters; i++ ) |
| if ( inters[i].t < tmin ) { |
| tmin = inters[i].t; |
| j = i; |
| } |
| if ( j ) |
| inters[0] = inters[j]; |
| } |
| gray = 0.2; |
| l0 = DotProduct3f ( &ray->v, &inters[0].nv ); |
| g0 = DotProduct3f ( &ld, &inters[0].nv ); |
| if ( g0*l0 > 0.0 ) { |
| gray += 0.7*fabs ( g0 ); |
| if ( gray > 1.0 ) |
| gray = 1.0; |
| } |
|
|
| return (byte)(255.0*gray); |
| } |
| else |
| return 160; |
|
|
| #undef MAXINTERS |
| #undef MAXLEVEL |
| } |
|
|
| static void RayTrace ( void ) |
| { |
| int x, y; |
| ray3f ray; |
| byte buffer[WIDTH]; |
|
|
| CPos.upside = false; |
| CameraSetMappingf ( &CPos ); |
| ps_Init_BitmapP ( WIDTH, HEIGHT, 0, 0 ); |
| for ( y = 0; y < HEIGHT; y++ ) { |
| printf ( "%4d\b\b\b\b", y ); |
| for ( x = 0; x < WIDTH; x++ ) { |
| CameraRayOfPixelf ( &CPos, x, y, &ray ); |
| buffer[x] = PixelColour ( &ray ); |
| } |
| ps_Out_LineP ( buffer ); |
| } |
| } |
|
|
| void DrawBezTreeVertexDivision ( BezPatchTreeVertexf *vertex, |
| float w, float h, float x, float y ) |
| { |
| float w1, h1; |
|
|
| if ( vertex->left ) { |
| if ( vertex->ctlpoints ) |
| ps_Set_Line_Width ( 1.0 ); |
| else |
| ps_Set_Line_Width ( 2.0 ); |
| if ( vertex->divdir == 0 ) { |
| w1 = w*(vertex->left->u1-vertex->left->u0)/(vertex->u1-vertex->u0); |
| ps_Draw_Line ( (float)(x+w1), (float)y, (float)(x+w1), (float)(y+h) ); |
| DrawBezTreeVertexDivision ( vertex->left, w1, h, x, y ); |
| DrawBezTreeVertexDivision ( vertex->right, w-w1, h, x+w1, y ); |
| } |
| else { |
| h1 = h*(vertex->left->v1-vertex->left->v0)/(vertex->v1-vertex->v0); |
| ps_Draw_Line ( (float)x, (float)(y+h1), (float)(x+w), (float)(y+h1) ); |
| DrawBezTreeVertexDivision ( vertex->left, w, h1, x, y ); |
| DrawBezTreeVertexDivision ( vertex->right, w, h-h1, x, y+h1 ); |
| } |
| } |
| } |
|
|
| void DrawBezTree ( BezPatchTreef *tree, float w, float x, float y ) |
| { |
| float h; |
|
|
| h = w*(tree->root->v1-tree->root->v0)/(tree->root->u1-tree->root->u0); |
| ps_Set_Gray ( 0.0 ); |
| ps_Set_Line_Width ( 2.0 ); |
| ps_Draw_Rect ( (float)w, (float)h, (float)x, (float)y ); |
| DrawBezTreeVertexDivision ( tree->root, w, h, x, y ); |
| } |
|
|
| int main ( void ) |
| { |
| struct tms start, stop; |
| float time; |
|
|
| setvbuf ( stdout, NULL, _IONBF, 0 ); |
| pkv_InitScratchMem ( 655360 ); |
| ps_WriteBBox ( -1, -1, 204, 88 ); |
| ps_OpenFile ( fn, 400 ); |
| SetCPos (); |
| SetLightDir (); |
|
|
| times ( &start ); |
| tree = rbez_NewBSPatchTreef ( 0, n, lknu, knots_u, m, lknv, knots_v, |
| lknv-m, cpoints ); |
| RayTrace (); |
| DrawBezTree ( tree, 480, 650, 0 ); |
|
|
| rbez_DestroyBezPatchTreef ( tree ); |
| times ( &stop ); |
| time = (float)(stop.tms_utime-start.tms_utime)/(float)(sysconf(_SC_CLK_TCK)); |
| printf ( "time = %8.3f\n", time ); |
| ps_CloseFile (); |
|
|
| pkv_DestroyScratchMem (); |
| exit ( 0 ); |
| } |
|
|
|
|
