X-Git-Url: http://git.mutantstargoat.com?a=blobdiff_plain;f=src%2Fterrain.cc;h=bdd787fdd4e3b44eb2181997f79f54488e36d75a;hb=243eb502c5dc70e586a9e81815234069bf623480;hp=e69de29bb2d1d6434b8b29ae775ad8c2e48c5391;hpb=54cc76a89b4221fac1b7f4a58259ca0ce836177d;p=demo

diff --git a/src/terrain.cc b/src/terrain.cc
index e69de29..bdd787f 100644
--- a/src/terrain.cc
+++ b/src/terrain.cc
@@ -0,0 +1,85 @@
+#include <gmath/gmath.h>
+
+#include "camera.h"
+#include "gfxapi.h"
+#include "image.h"
+#include "mesh.h"
+#include "meshgen.h"
+#include "object.h"
+#include "scene.h"
+#include "terrain.h"
+
+static float calc_height(float u, float v, void *ptr);
+
+Terrain::Terrain()
+{
+	vis_scene = 0;
+}
+
+Terrain::~Terrain()
+{
+}
+
+bool Terrain::init()
+{
+	vis_scene = new Scene;
+
+	return true;
+}
+
+void Terrain::destroy()
+{
+	delete vis_scene;
+}
+
+bool Terrain::generate(const TerrainParams &params)
+{
+	tiles.clear();
+
+	float txsz = params.xsz / params.xtiles;
+	float tysz = params.ysz / params.ytiles;
+
+	for(int i=0; i<params.ytiles; i++) {
+		for(int j=0; j<params.xtiles; j++) {
+			TerrainTile tile;
+			tile.mesh = gfx_create_mesh();
+
+			gen_heightfield(tile.mesh, txsz, tysz, params.max_height,
+					params.tile_usub, params.tile_vsub, calc_height,
+					(void*)&params);
+
+			tile.mesh->update_vertex_data();
+			tiles.push_back(tile);
+
+/*
+	the terrain scene stores objects only
+	no need to fill the mat, mesh std::vectors
+*/
+			Object *o = new Object;
+			o->mesh = tile.mesh;
+			o->material = &material;
+			o->transform = Mat4::identity;
+
+			vis_scene->objects.push_back(o);
+		}
+	}
+	return true;
+}
+
+Scene *Terrain::get_visible(const Camera *camera) const
+{
+	return vis_scene;
+}
+
+static float calc_height(float u, float v, void *ptr)
+{
+	if(!ptr) {
+		fprintf(stderr, "Terrain parameters not found.\n");
+		return 0;
+	}
+
+	TerrainParams *tp = (TerrainParams*)ptr;
+	float sn = gph::fbm(u * tp->noise_freq, v * tp->noise_freq, tp->num_octaves);
+	/* todo use the image later */
+	return sn;
+}
\ No newline at end of file