From 47c128a3106206038e45eb8b8abf6c712f29ac14 Mon Sep 17 00:00:00 2001 From: Tavian Barnes Date: Wed, 1 Jul 2009 04:45:23 +0000 Subject: New C++ dmnsn_camera* wrapper. --- libdimension/camera.c | 57 --------------------------------------------------- 1 file changed, 57 deletions(-) (limited to 'libdimension/camera.c') diff --git a/libdimension/camera.c b/libdimension/camera.c index c353cbe..d842869 100644 --- a/libdimension/camera.c +++ b/libdimension/camera.c @@ -34,60 +34,3 @@ dmnsn_delete_camera(dmnsn_camera *camera) { free(camera); } - -/* Perspective camera */ - -/* Perspective camera ray callback */ -static dmnsn_line dmnsn_perspective_camera_ray_fn(const dmnsn_camera *camera, - const dmnsn_canvas *canvas, - unsigned int x, - unsigned int y); - -/* Create a new perspective camera. Rays are aimed from the origin to a screen - located on the z = 1 frame, from (-0.5, -0.5) to (0.5, 0.5). Rays are then - transformed by the matrix `trans'. */ -dmnsn_camera * -dmnsn_new_perspective_camera(dmnsn_matrix trans) -{ - dmnsn_camera *camera = dmnsn_new_camera(); - if (camera) { - camera->ray_fn = &dmnsn_perspective_camera_ray_fn; - - camera->ptr = malloc(sizeof(dmnsn_matrix)); - if (!camera->ptr) { - dmnsn_delete_camera(camera); - return NULL; - } - *((dmnsn_matrix*)camera->ptr) = trans; - } - return camera; -} - -/* Delete a perspective camera */ -void -dmnsn_delete_perspective_camera(dmnsn_camera *camera) -{ - if (camera) { - free(camera->ptr); - dmnsn_delete_camera(camera); - } -} - -static dmnsn_line -dmnsn_perspective_camera_ray_fn(const dmnsn_camera *camera, - const dmnsn_canvas *canvas, - unsigned int x, unsigned int y) -{ - dmnsn_matrix *trans = (dmnsn_matrix *)camera->ptr; - dmnsn_line l; - - /* Rays originate at the origin, oddly enough */ - l.x0 = dmnsn_vector_construct(0.0, 0.0, 0.0); - - /* Aim at the z = 1 plane */ - l.n.x = ((double)x)/(canvas->x - 1) - 0.5; - l.n.y = ((double)y)/(canvas->y - 1) - 0.5; - l.n.z = 1.0; - - return dmnsn_matrix_line_mul(*trans, l); -} -- cgit v1.2.3