| Guido van Rossum | 453bd40 | 1992-03-30 13:18:37 +0000 | [diff] [blame^] | 1 | #! /usr/local/python |
| 2 | |
| 3 | # zrgb (Requires Z buffer.) |
| 4 | # |
| 5 | # This program demostrates zbuffering 3 intersecting RGB polygons while |
| 6 | # in doublebuffer mode where, movement of the mouse with the LEFTMOUSE |
| 7 | # button depressed will, rotate the 3 polygons. This is done by compound |
| 8 | # rotations allowing continuous screen-oriented rotations. |
| 9 | # |
| 10 | # Press the "Esc" key to exit. |
| 11 | |
| 12 | from gl import * |
| 13 | from GL import * |
| 14 | from DEVICE import * |
| 15 | |
| 16 | |
| 17 | idmat=[1,0,0,0,0,1,0,0,0,0,1,0,0,0,0,1] |
| 18 | |
| 19 | def main() : |
| 20 | # |
| 21 | # old and new mouse position |
| 22 | # |
| 23 | # |
| 24 | mode = 0 |
| 25 | omx = 0 |
| 26 | mx = 0 |
| 27 | omy = 0 |
| 28 | my = 0 |
| 29 | # |
| 30 | objmat=[1,0,0,0,0,1,0,0,0,0,1,0,0,0,0,1] |
| 31 | # |
| 32 | initialize () |
| 33 | # |
| 34 | draw_scene (objmat) |
| 35 | # |
| 36 | while (1) : |
| 37 | # |
| 38 | dev, val = qread() |
| 39 | # |
| 40 | if dev == ESCKEY : |
| 41 | if val : |
| 42 | break |
| 43 | # exit when key is going up, not down |
| 44 | # this avoids the scenario where a window |
| 45 | # underneath this program's window |
| 46 | # would otherwise "eat up" the up- |
| 47 | # event of the Esc key being released |
| 48 | return |
| 49 | # |
| 50 | elif dev == REDRAW : |
| 51 | reshapeviewport() |
| 52 | draw_scene(objmat) |
| 53 | # |
| 54 | elif dev == LEFTMOUSE: |
| 55 | omx = mx |
| 56 | omy = my |
| 57 | if val : |
| 58 | mode = 1 |
| 59 | else : |
| 60 | mode = 0 |
| 61 | elif dev == MOUSEX : |
| 62 | omx = mx |
| 63 | mx = val |
| 64 | #print omx, mx |
| 65 | objmat = update_scene(objmat,mx,my,omx,omy,mode) |
| 66 | # |
| 67 | elif dev == MOUSEY : |
| 68 | omy = my |
| 69 | my = val |
| 70 | #print omy, my |
| 71 | objmat = update_scene(objmat,mx,my,omx,omy,mode) |
| 72 | # |
| 73 | |
| 74 | |
| 75 | def initialize () : |
| 76 | # |
| 77 | foreground () |
| 78 | keepaspect(5, 4) |
| 79 | w = winopen('Zbuffered RGB') |
| 80 | # |
| 81 | doublebuffer() |
| 82 | RGBmode() |
| 83 | gconfig() |
| 84 | zbuffer(1) |
| 85 | lsetdepth(0x0, 0x7FFFFF) |
| 86 | # |
| 87 | qdevice(ESCKEY) |
| 88 | qdevice(LEFTMOUSE) |
| 89 | qdevice(MOUSEX) |
| 90 | qdevice(MOUSEY) |
| 91 | |
| 92 | def update_scene (mat, mx, my, omx, omy, mode) : |
| 93 | # |
| 94 | if mode == 1 : |
| 95 | mat = orient(mat, mx, my, omx, omy) |
| 96 | draw_scene(mat) |
| 97 | return mat |
| 98 | |
| 99 | def orient (mat, mx, my, omx, omy) : |
| 100 | # |
| 101 | # |
| 102 | pushmatrix() |
| 103 | loadmatrix(idmat) |
| 104 | # |
| 105 | if mx - omx : rot (float (mx - omx), 'y') |
| 106 | if omy - my : rot (float (omy - my), 'x') |
| 107 | # |
| 108 | multmatrix(mat) |
| 109 | mat = getmatrix() |
| 110 | # |
| 111 | popmatrix() |
| 112 | # |
| 113 | return mat |
| 114 | |
| 115 | def draw_scene (mat) : |
| 116 | RGBcolor(40, 100, 200) |
| 117 | clear() |
| 118 | zclear() |
| 119 | # |
| 120 | perspective(400, 1.25, 30.0, 60.0) |
| 121 | translate(0.0, 0.0, -40.0) |
| 122 | multmatrix(mat) |
| 123 | # |
| 124 | # skews original view to show all polygons |
| 125 | # |
| 126 | rotate(-580, 'y') |
| 127 | draw_polys() |
| 128 | # |
| 129 | swapbuffers() |
| 130 | |
| 131 | polygon1 = [(-10.0,-10.0,0.0),(10.0,-10.0,0.0),(-10.0,10.0,0.0)] |
| 132 | |
| 133 | polygon2 = [(0.0,-10.0,-10.0),(0.0,-10.0,10.0),(0.0,5.0,-10.0)] |
| 134 | |
| 135 | polygon3 = [(-10.0,6.0,4.0),(-10.0,3.0,4.0),(4.0,-9.0,-10.0),(4.0,-6.0,-10.0)] |
| 136 | |
| 137 | def draw_polys(): |
| 138 | bgnpolygon() |
| 139 | cpack(0x0) |
| 140 | v3f(polygon1[0]) |
| 141 | cpack(0x007F7F7F) |
| 142 | v3f(polygon1[1]) |
| 143 | cpack(0x00FFFFFF) |
| 144 | v3f(polygon1[2]) |
| 145 | endpolygon() |
| 146 | # |
| 147 | bgnpolygon() |
| 148 | cpack(0x0000FFFF) |
| 149 | v3f(polygon2[0]) |
| 150 | cpack(0x007FFF00) |
| 151 | v3f(polygon2[1]) |
| 152 | cpack(0x00FF0000) |
| 153 | v3f(polygon2[2]) |
| 154 | endpolygon() |
| 155 | # |
| 156 | bgnpolygon() |
| 157 | cpack(0x0000FFFF) |
| 158 | v3f(polygon3[0]) |
| 159 | cpack(0x00FF00FF) |
| 160 | v3f(polygon3[1]) |
| 161 | cpack(0x00FF0000) |
| 162 | v3f(polygon3[2]) |
| 163 | cpack(0x00FF00FF) |
| 164 | v3f(polygon3[3]) |
| 165 | endpolygon() |
| 166 | |
| 167 | |
| 168 | main () |