add first person demo

1 files changed, 15 insertions, 0 deletions

diff --git a/src/glm/camera.c b/src/glm/camera.c
index 7180b77..11d309d 100644
--- a/src/glm/camera.c
+++ b/src/glm/camera.c
@@ -2,15 +2,18 @@
 #include <honeysuckle.h>
 #include <cglm/cglm.h>
 #include "util/util.h"
+#include "glm.h"
 
 
 int perspective(lua_State *L);
+int look(lua_State *L);
 
 
 void setup_camera(lua_State *L, int glm_tbl)
 {
 	int tbl = hs_create_table(L,
 		hs_str_cfunc("perspective", perspective),
+		hs_str_cfunc("look", look),
 	);
 
 	append_table(L, glm_tbl, tbl);
@@ -28,3 +31,15 @@ int perspective(lua_State *L)
 	glm_perspective(fov, aspect, near, far, *dest);
 	return 0;
 }
+
+
+int look(lua_State *L)
+{
+	float *eye = luaL_checkudata(L, 1, vec3_tname);
+	float *dir = luaL_checkudata(L, 2, vec3_tname);
+	float *up  = luaL_checkudata(L, 3, vec3_tname);
+	void *dest  = luaL_checkudata(L, 4, mat4_tname);
+
+	glm_look(eye, dir, up, dest);
+	return 0;
+}