Lots of work on libGIS

[aweather] / src / gis / roam.h

diff --git a/src/gis/roam.h b/src/gis/roam.h
new file mode 100644 (file)
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--- /dev/null
+++ b/src/gis/roam.h
@@ -0,0 +1,104 @@
+/*
+ * Copyright (C) 2009 Andy Spencer <spenceal@rose-hulman.edu>
+ * 
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ * 
+ * This program 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 General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __ROAM_H__
+#define __ROAM_H__
+
+#include "gpqueue.h"
+
+/* Roam */
+typedef struct _RoamPoint    RoamPoint;
+typedef struct _RoamTriangle RoamTriangle;
+typedef struct _RoamDiamond  RoamDiamond;
+typedef struct _RoamSphere   RoamSphere;
+typedef void (*RoamTriFunc)(RoamTriangle *triangle, gpointer user_data);
+typedef void (*RoamHeightFunc)(RoamPoint *point, gpointer user_data);
+
+/*************
+ * RoamPoint *
+ *************/
+struct _RoamPoint {
+       double x,y,z;
+       double coords;  // Texture coordinantes 
+       double norm[3]; // Vertex normal
+       int    refs;    // Reference count
+};
+RoamPoint *roam_point_new(double x, double y, double z);
+void roam_point_add_triangle(RoamPoint *point, RoamTriangle *triangle);
+void roam_point_remove_triangle(RoamPoint *point, RoamTriangle *triangle);
+
+/****************
+ * RoamTriangle *
+ ****************/
+struct _RoamTriangle {
+       struct { RoamPoint    *l,*m,*r; } p;
+       struct { RoamTriangle *l,*b,*r; } t;
+       RoamDiamond *diamond;
+       double norm[3];
+       double error;
+       GPQueueHandle handle;
+};
+RoamTriangle *roam_triangle_new(RoamPoint *l, RoamPoint *m, RoamPoint *r);
+void roam_triangle_add(RoamTriangle *triangle,
+               RoamTriangle *left, RoamTriangle *base, RoamTriangle *right,
+               RoamSphere *sphere);
+void roam_triangle_remove(RoamTriangle *triangle, RoamSphere *sphere);
+void roam_triangle_update_error(RoamTriangle *triangle, RoamSphere *sphere, GPQueue *triangles);
+void roam_triangle_split(RoamTriangle *triangle, RoamSphere *sphere);
+void roam_triangle_draw_normal(RoamTriangle *triangle);
+
+/***************
+ * RoamDiamond *
+ ***************/
+struct _RoamDiamond {
+       RoamTriangle *kid[4];
+       RoamTriangle *parent[2];
+       double error;
+       gboolean active;
+       GPQueueHandle handle;
+};
+RoamDiamond *roam_diamond_new(
+               RoamTriangle *parent0, RoamTriangle *parent1,
+               RoamTriangle *kid0, RoamTriangle *kid1,
+               RoamTriangle *kid2, RoamTriangle *kid3);
+void roam_diamond_add(RoamDiamond *diamond, RoamSphere *sphere);
+void roam_diamond_remove(RoamDiamond *diamond, RoamSphere *sphere);
+void roam_diamond_merge(RoamDiamond *diamond, RoamSphere *sphere);
+void roam_diamond_update_error(RoamDiamond *self, RoamSphere *sphere, GPQueue *diamonds);
+
+/**************
+ * RoamSphere *
+ **************/
+struct _RoamSphere {
+       GPQueue *triangles;
+       GPQueue *diamonds;
+       RoamTriFunc tri_func;
+       RoamHeightFunc height_func;
+       gpointer user_data;
+       gint polys;
+};
+RoamSphere *roam_sphere_new(RoamTriFunc tri_func, RoamHeightFunc height_func, gpointer user_data);
+void roam_sphere_update_errors(RoamSphere *sphere);
+void roam_sphere_update_point(RoamSphere *sphere, RoamPoint *point);
+void roam_sphere_split_one(RoamSphere *sphere);
+void roam_sphere_merge_one(RoamSphere *sphere);
+gint roam_sphere_split_merge(RoamSphere *sphere);
+void roam_sphere_draw(RoamSphere *sphere);
+void roam_sphere_draw_normals(RoamSphere *sphere);
+void roam_sphere_free(RoamSphere *sphere);
+
+#endif