ref: 02597db21d25fedde53513967cd979d38acbceec
dir: /projtest.c/
#include <u.h> #include <libc.h> #include <thread.h> #include <draw.h> #include <memdraw.h> #include <mouse.h> #include <keyboard.h> #include <geometry.h> #include "libobj/obj.h" #include "libgraphics/graphics.h" #include "fns.h" Camera *cam; void usage(void) { fprint(2, "usage: %s\n", argv0); exits("usage"); } void threadmain(int argc, char *argv[]) { Point3 np, fp; Framebuf *fb; GEOMfmtinstall(); ARGBEGIN{ default: usage(); }ARGEND if(argc != 0) usage(); if(memimageinit() != 0) sysfatal("memimageinit: %r"); cam = Cam(Rect(0,0,640,480), nil, PERSPECTIVE, 40*DEG, 0.01, 10); placecamera(cam, nil, Pt3(0,0,1,1), Vec3(0,0,0), Vec3(0,1,0)); fb = cam->view->getfb(cam->view); np = Pt3(0,0,-0.01,1); fp = Pt3(0,0,-10,1); fprint(2, "near %V\nfar %V\n", np, fp); np = vcs2clip(cam, np); fp = vcs2clip(cam, fp); fprint(2, "E → C\n"); fprint(2, "near %V\n", np); fprint(2, "far %V\n", fp); np = clip2ndc(np); fp = clip2ndc(fp); fprint(2, "C → N\n"); fprint(2, "near %V\n", np); fprint(2, "far %V\n", fp); np = ndc2viewport(fb, np); fp = ndc2viewport(fb, fp); fprint(2, "N → V\n"); fprint(2, "near %V\n", np); fprint(2, "far %V\n", fp); np = viewport2ndc(fb, np); fp = viewport2ndc(fb, fp); fprint(2, "V → N\n"); fprint(2, "near %V\n", np); fprint(2, "far %V\n", fp); np = ndc2vcs(cam, np); fp = ndc2vcs(cam, fp); fprint(2, "N → E\n"); fprint(2, "near %V\n", np); fprint(2, "far %V\n", fp); fprint(2, "\n"); np = Pt3(Dx(fb->r)/2.0,Dy(fb->r)/2.0,1,1); fp = Pt3(Dx(fb->r)/2.0,Dy(fb->r)/2.0,0,1); fprint(2, "near %V\nfar %V\n", np, fp); np = viewport2ndc(fb, np); fp = viewport2ndc(fb, fp); fprint(2, "V → N\n"); fprint(2, "near %V\n", np); fprint(2, "far %V\n", fp); np = ndc2vcs(cam, np); fp = ndc2vcs(cam, fp); fprint(2, "N → E\n"); fprint(2, "near %V\n", np); fprint(2, "far %V\n", fp); np = vcs2clip(cam, np); fp = vcs2clip(cam, fp); fprint(2, "E → C\n"); fprint(2, "near %V\n", np); fprint(2, "far %V\n", fp); np = clip2ndc(np); fp = clip2ndc(fp); fprint(2, "C → N\n"); fprint(2, "near %V\n", np); fprint(2, "far %V\n", fp); np = ndc2viewport(fb, np); fp = ndc2viewport(fb, fp); fprint(2, "N → V\n"); fprint(2, "near %V\n", np); fprint(2, "far %V\n", fp); exits(nil); }