125 lines
2.4 KiB
C
125 lines
2.4 KiB
C
#include <c64/memmap.h>
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#include <c64/vic.h>
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#include <gfx/bitmap.h>
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#include <string.h>
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#include <conio.h>
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#include <stdio.h>
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#include <gfx/vector3d.h>
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#include <math.h>
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char * const Color = (char *)0xd000;
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char * const Hires = (char *)0xe000;
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Bitmap Screen;
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void init(void)
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{
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mmap_trampoline();
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mmap_set(MMAP_RAM);
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memset(Color, 0x01, 1000);
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memset(Hires, 0x00, 8000);
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mmap_set(MMAP_NO_ROM);
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vic_setmode(VICM_HIRES, Color, Hires);
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vic.color_border = VCOL_WHITE;
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bm_init(&Screen, Hires, 40, 25);
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}
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void done(void)
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{
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mmap_set(MMAP_ROM);
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getch();
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vic_setmode(VICM_TEXT, (char *)0x0400, (char *)0x1000);
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}
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Matrix4 wmat, pmat, tmat, rmat;
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Vector3 corners[8];
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ClipRect cr = {0, 0, 320, 200};
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struct Point
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{
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int x, y;
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};
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Point tcorners[8], pcorners[8];
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void drawCube(void)
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{
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for(char i=0; i<8; i++)
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{
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if (!(i & 1))
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bm_line(&Screen, &cr, tcorners[i].x, tcorners[i].y, tcorners[i | 1].x, tcorners[i | 1].y, 0xff, LINOP_XOR);
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if (!(i & 2))
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bm_line(&Screen, &cr, tcorners[i].x, tcorners[i].y, tcorners[i | 2].x, tcorners[i | 2].y, 0xff, LINOP_XOR);
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if (!(i & 4))
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bm_line(&Screen, &cr, tcorners[i].x, tcorners[i].y, tcorners[i | 4].x, tcorners[i | 4].y, 0xff, LINOP_XOR);
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pcorners[i] = tcorners[i];
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}
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}
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void hideCube(void)
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{
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for(char i=0; i<8; i++)
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{
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if (!(i & 1))
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bm_line(&Screen, &cr, pcorners[i].x, pcorners[i].y, pcorners[i | 1].x, pcorners[i | 1].y, 0xff, LINOP_XOR);
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if (!(i & 2))
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bm_line(&Screen, &cr, pcorners[i].x, pcorners[i].y, pcorners[i | 2].x, pcorners[i | 2].y, 0xff, LINOP_XOR);
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if (!(i & 4))
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bm_line(&Screen, &cr, pcorners[i].x, pcorners[i].y, pcorners[i | 4].x, pcorners[i | 4].y, 0xff, LINOP_XOR);
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}
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}
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int main(void)
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{
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init();
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mat4_ident(&wmat);
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mat4_make_perspective(&pmat, 0.5 * PI, 1.0, 0.0, 200.0);
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mat4_scale(&wmat, 1);
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for(int k=0; k<100; k++)
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{
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mat4_set_rotate_x(&rmat, 0.1 * k);
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mat4_set_rotate_y(&tmat, 0.06 * k);
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mat4_rmmul(&rmat, &tmat);
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mat4_rmmul(&rmat, &wmat);
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rmat.m[14] += 5.0;
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tmat = pmat;
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mat4_mmul(&tmat, &rmat);
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for(char i=0; i<8; i++)
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{
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vec3_set(corners + i,
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(i & 1) ? -1.0 : 1.0,
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(i & 2) ? -1.0 : 1.0,
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(i & 4) ? -1.0 : 1.0);
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}
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for(char i=0; i<8; i++)
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{
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Vector3 vd;
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vec3_project(&vd, &rmat, corners + i);
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tcorners[i].x = (int)(vd.v[0] * 100) + 160;
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tcorners[i].y = (int)(vd.v[1] * 100) + 100;
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}
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hideCube();
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drawCube();
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}
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done();
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return 0;
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} |