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authorTavian Barnes <tavianator@gmail.com>2009-06-13 20:47:11 +0000
committerTavian Barnes <tavianator@gmail.com>2009-06-13 20:47:11 +0000
commit4ef467adcb69fecadf9e8410fc8b33e1bb307365 (patch)
treeaf61be21ad670da00d37bdeced3430d029971792 /libdimension
parent9b6ca3e20b1d0a9ab7f821963c63c9b2b3c4fc40 (diff)
downloaddimension-4ef467adcb69fecadf9e8410fc8b33e1bb307365.tar.xz
Work towards a raytracing engine.
Diffstat (limited to 'libdimension')
-rw-r--r--libdimension/Makefile.am4
-rw-r--r--libdimension/dimension.h1
-rw-r--r--libdimension/dimension/scene.h39
-rw-r--r--libdimension/scene.c74
4 files changed, 116 insertions, 2 deletions
diff --git a/libdimension/Makefile.am b/libdimension/Makefile.am
index 136d652..857d233 100644
--- a/libdimension/Makefile.am
+++ b/libdimension/Makefile.am
@@ -17,10 +17,10 @@
## along with this program. If not, see <http://www.gnu.org/licenses/>. ##
###########################################################################
-nobase_include_HEADERS = dimension.h dimension/array.h dimension/canvas.h dimension/color.h dimension/error.h dimension/geometry.h dimension/png.h dimension/object.h dimension/sphere.h
+nobase_include_HEADERS = dimension.h dimension/array.h dimension/canvas.h dimension/color.h dimension/error.h dimension/geometry.h dimension/png.h dimension/object.h dimension/scene.h dimension/sphere.h
lib_LTLIBRARIES = libdimension.la
-libdimension_la_SOURCES = $(nobase_include_HEADERS) array.c canvas.c color.c error.c geometry.c png.c object.c sphere.c
+libdimension_la_SOURCES = $(nobase_include_HEADERS) array.c canvas.c color.c error.c geometry.c png.c object.c scene.c sphere.c
libdimension_la_LDFLAGS = -version-info 0:0:0
libdimension_la_LIBADD = -lm -lpthread -lpng
diff --git a/libdimension/dimension.h b/libdimension/dimension.h
index 50e1544..e7fbe55 100644
--- a/libdimension/dimension.h
+++ b/libdimension/dimension.h
@@ -32,6 +32,7 @@ extern "C" {
#include <dimension/color.h>
#include <dimension/canvas.h>
#include <dimension/object.h>
+#include <dimension/scene.h>
#include <dimension/png.h>
#ifdef __cplusplus
diff --git a/libdimension/dimension/scene.h b/libdimension/dimension/scene.h
new file mode 100644
index 0000000..e075cdd
--- /dev/null
+++ b/libdimension/dimension/scene.h
@@ -0,0 +1,39 @@
+/*************************************************************************
+ * Copyright (C) 2008 Tavian Barnes <tavianator@gmail.com> *
+ * *
+ * This file is part of The Dimension Library. *
+ * *
+ * The Dimension Library is free software; you can redistribute it and/ *
+ * or modify it under the terms of the GNU Lesser General Public License *
+ * as published by the Free Software Foundation; either version 3 of the *
+ * License, or (at your option) any later version. *
+ * *
+ * The Dimension Library is distributed in the hope that it will be *
+ * useful, but WITHOUT ANY WARRANTY; without even the implied warranty *
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
+ * Lesser General Public License for more details. *
+ * *
+ * You should have received a copy of the GNU Lesser General Public *
+ * License along with this program. If not, see *
+ * <http://www.gnu.org/licenses/>. *
+ *************************************************************************/
+
+#ifndef DIMENSION_SCENE_H
+#define DIMENSION_SCENE_H
+
+/*
+ * A scene.
+ */
+
+typedef struct {
+ dmnsn_color background;
+ dmnsn_array *objects;
+ dmnsn_canvas *canvas;
+} dmnsn_scene;
+
+dmnsn_scene *dmnsn_new_scene(unsigned int x, unsigned int y);
+void dmnsn_delete_scene(dmnsn_scene *scene);
+
+void dmnsn_raytrace_scene(dmnsn_scene *scene);
+
+#endif /* DIMENSION_SCENE_H */
diff --git a/libdimension/scene.c b/libdimension/scene.c
new file mode 100644
index 0000000..541e3ba
--- /dev/null
+++ b/libdimension/scene.c
@@ -0,0 +1,74 @@
+/*************************************************************************
+ * Copyright (C) 2008 Tavian Barnes <tavianator@gmail.com> *
+ * *
+ * This file is part of The Dimension Library. *
+ * *
+ * The Dimension Library is free software; you can redistribute it and/ *
+ * or modify it under the terms of the GNU Lesser General Public License *
+ * as published by the Free Software Foundation; either version 3 of the *
+ * License, or (at your option) any later version. *
+ * *
+ * The Dimension Library is distributed in the hope that it will be *
+ * useful, but WITHOUT ANY WARRANTY; without even the implied warranty *
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
+ * Lesser General Public License for more details. *
+ * *
+ * You should have received a copy of the GNU Lesser General Public *
+ * License along with this program. If not, see *
+ * <http://www.gnu.org/licenses/>. *
+ *************************************************************************/
+
+#include "dimension.h"
+#include <stdlib.h> /* For malloc */
+
+dmnsn_scene *
+dmnsn_new_scene(unsigned int x, unsigned int y)
+{
+ dmnsn_scene *scene = malloc(sizeof(dmnsn_scene));
+ if (scene) {
+ scene->objects = dmnsn_new_array(sizeof(dmnsn_object*));
+
+ scene->canvas = dmnsn_new_canvas(x, y);
+ if (!scene->canvas) {
+ dmnsn_delete_array(scene->objects);
+ return NULL;
+ }
+ }
+
+ return scene;
+}
+
+void
+dmnsn_delete_scene(dmnsn_scene *scene)
+{
+ if (scene) {
+ dmnsn_delete_array(scene->objects);
+ free(scene);
+ }
+}
+
+void
+dmnsn_raytrace_scene(dmnsn_scene *scene)
+{
+ unsigned int i, j;
+ dmnsn_object *object;
+ dmnsn_line l;
+
+ l.x0 = dmnsn_vector_construct(0.0, 0.0, -3.0);
+ dmnsn_array_get(scene->objects, 0, &object);
+
+ for (i = 0; i < scene->canvas->x; ++i) {
+ for (j = 0; j < scene->canvas->y; ++j) {
+ l.n.x = 1.6*(((double)i)/(scene->canvas->x - 1) - 0.5);
+ l.n.y = ((double)j)/(scene->canvas->y - 1) - 0.5;
+ l.n.z = 1.0;
+
+ if ((*object->intersections_fn)(l)->length > 0) {
+ dmnsn_set_pixel(scene->canvas, i, j,
+ dmnsn_color_from_XYZ(dmnsn_whitepoint));
+ } else {
+ dmnsn_set_pixel(scene->canvas, i, j, scene->background);
+ }
+ }
+ }
+}