--- /dev/null
+/*
+ * 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/>.
+ */
+
+#include <glib.h>
+#include <GL/glu.h>
+
+#include "gis-world.h"
+#include "gis-prims.h"
+
+/* TODO
+ * - Manage normals for GisPoint
+ */
+
+/* GisPoint */
+GisPoint *gis_point_new()
+{
+ return g_new0(GisPoint, 1);
+}
+
+void gis_point_set_lle(GisPoint *self, gdouble lat, gdouble lon, gdouble elev)
+{
+ self->lat = lat;
+ self->lon = lon;
+ self->elev = elev;
+ lle2xyz(self->lat, self->lon, self->elev,
+ &self->x, &self->y, &self->z);
+}
+
+void gis_point_set_xyz(GisPoint *self, gdouble x, gdouble y, gdouble z)
+{
+ self->x = x;
+ self->y = y;
+ self->z = z;
+}
+
+void gis_point_set_coords(GisPoint *self, gdouble x, gdouble y)
+{
+ self->cx = x;
+ self->cy = y;
+}
+
+void gis_point_project(GisPoint *self, GisProjection *proj)
+{
+ gluProject(self->x, self->y, self->z,
+ proj->model, proj->proj, proj->view,
+ &self->px, &self->py, &self->pz);
+}
+
+GisPoint *gis_point_ref(GisPoint *self)
+{
+ self->refs++;
+ return self;
+}
+
+void gis_point_unref(GisPoint *self)
+{
+ self->refs--;
+ if (self->refs <= 0)
+ g_free(self);
+}
+
+
+/* GisTriangle */
+GisTriangle *gis_triangle_new(GisPoint *a, GisPoint *b, GisPoint *c, guint tex)
+{
+ GisTriangle *self = g_new0(GisTriangle, 1);
+ gis_point_set_xyz(&GIS_PRIMITIVE(self)->center,
+ (a->x + b->x + c->x)/3,
+ (a->y + b->y + c->y)/3,
+ (a->z + b->z + c->z)/3);
+ self->verts[0] = gis_point_ref(a);
+ self->verts[1] = gis_point_ref(b);
+ self->verts[2] = gis_point_ref(c);
+ self->tex = tex;
+ return self;
+}
+
+void gis_triangle_free(GisTriangle *self)
+{
+ gis_point_unref(self->verts[0]);
+ gis_point_unref(self->verts[1]);
+ gis_point_unref(self->verts[2]);
+ g_free(self);
+}
+
+
+/* GisQuad */
+GisQuad *gis_quad_new(GisPoint *a, GisPoint *b, GisPoint *c, GisPoint *d, guint tex)
+{
+ GisQuad *self = g_new0(GisQuad, 1);
+ gis_point_set_xyz(&GIS_PRIMITIVE(self)->center,
+ (a->x + b->x + c->x + d->x)/4,
+ (a->y + b->y + c->y + d->y)/4,
+ (a->z + b->z + c->z + d->z)/4);
+ self->verts[0] = gis_point_ref(a);
+ self->verts[1] = gis_point_ref(b);
+ self->verts[2] = gis_point_ref(c);
+ self->verts[3] = gis_point_ref(d);
+ self->tex = tex;
+ return self;
+}
+
+void gis_quad_free(GisQuad *self)
+{
+ gis_point_unref(self->verts[0]);
+ gis_point_unref(self->verts[1]);
+ gis_point_unref(self->verts[2]);
+ gis_point_unref(self->verts[3]);
+ g_free(self);
+}
+
+
+/* GisCallback */
+GisCallback *gis_callback_new(GisCallbackFunc callback, gpointer user_data)
+{
+ GisCallback *self = g_new0(GisCallback, 1);
+ self->callback = callback;
+ self->user_data = user_data;
+ return self;
+}
+
+void gis_callback_free(GisCallback *self)
+{
+ g_free(self);
+}
--- /dev/null
+/*
+ * 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 __GIS_PRIMITIVES_H__
+#define __GIS_PRIMITIVES_H__
+
+#include <glib.h>
+
+/* Base types */
+typedef struct _GisProjection GisProjection;
+typedef struct _GisPoint GisPoint;
+
+struct _GisProjection {
+ gdouble model[16];
+ gdouble proj[16];
+ gint view[4];
+};
+struct _GisPoint {
+ union {
+ gdouble lle[3];
+ struct { gdouble lat, lon, elev; };
+ };
+ union {
+ gdouble xyz[3];
+ struct { gdouble x, y, z; };
+ };
+ union {
+ gdouble proj[3];
+ struct { gdouble px, py, pz; };
+ };
+ union {
+ gdouble norm[3];
+ struct { gdouble nx, ny, nz; };
+ };
+ union {
+ gdouble coords[2];
+ struct { gdouble cx, cy, xz; };
+ };
+ gint refs;
+};
+
+/* Primitives */
+#define GIS_PRIMITIVE(primitive) ((GisPrimitive*)primitive)
+#define GIS_TRIANGLE (triangle ) ((GisTriangle *)triangel )
+#define GIS_QUAD (quad ) ((GisQuad *)quad )
+#define GIS_CALLBACK (callback ) ((GisCallback *)callback )
+
+typedef struct _GisPrimitive GisPrimitive;
+typedef struct _GisTriangle GisTriangle;
+typedef struct _GisQuad GisQuad;
+typedef struct _GisCallback GisCallback;
+
+typedef gpointer (*GisCallbackFunc)(GisCallback *callback, gpointer user_data);
+
+struct _GisPrimitive {
+ GisPoint center;
+ GisProjection *proj;
+};
+struct _GisTriangle {
+ GisPrimitive parent;
+ GisPoint *verts[3];
+ guint tex;
+};
+struct _GisQuad {
+ GisPrimitive parent;
+ GisPoint *verts[4];
+ guint tex;
+};
+struct _GisCallback {
+ GisPrimitive parent;
+ GisCallbackFunc callback;
+ gpointer user_data;
+};
+
+/* Support functions */
+GisPoint *gis_point_new();
+void gis_point_set_lle(GisPoint *point, gdouble lat, gdouble lon, gdouble elev);
+void gis_point_set_xyz(GisPoint *point, gdouble x, gdouble y, gdouble z);
+void gis_point_set_coords(GisPoint *point, gdouble x, gdouble y);
+void gis_point_project(GisPoint *point, GisProjection *proj);
+GisPoint *gis_point_ref(GisPoint *point);
+void gis_point_unref(GisPoint *point);
+
+GisTriangle *gis_triangle_new(GisPoint *a, GisPoint *b, GisPoint *c, guint tex);
+void gis_triangle_free(GisTriangle *tri);
+
+GisQuad *gis_quad_new(GisPoint *a, GisPoint *b, GisPoint *c, GisPoint *d, guint tex);
+void gis_quad_free(GisQuad *quad);
+
+GisCallback *gis_callback_new(GisCallbackFunc callback, gpointer user_data);
+void gis_callback_free(GisCallback *cb);
+
+#endif
projects / grits / commitdiff