add glm vec3 and vec4 bindings as lua objects

1 files changed, 343 insertions, 0 deletions

diff --git a/src/glm_vec4_bindings.c b/src/glm_vec4_bindings.c
new file mode 100644
index 0000000..878473f
--- /dev/null
+++ b/src/glm_vec4_bindings.c
@@ -0,0 +1,343 @@
+#include "glm_bindings.h"
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ * Vec4 Functions
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ */
+
+
+int honey_glm_vec4_copy(lua_State* L)
+{
+    honey_glm_array *self, *dest;
+    honey_lua_parse_arguments
+	(L, 1, 2, HONEY_USERDATA, &self, HONEY_USERDATA, &dest);
+
+    if (dest->type != VEC4)
+	honey_lua_throw_error(L, "destination must be VEC4 (%d); got %d instead",
+			      dest->type);
+
+    glm_vec4_copy(self->data, dest->data);
+    return 0;
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+int honey_glm_vec4_zero(lua_State* L)
+{
+    honey_glm_array *self;
+    honey_lua_parse_arguments(L, 1, 1, HONEY_USERDATA, &self);
+
+    glm_vec4_zero(self->data);
+    return 0;
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+int honey_glm_vec4_eye(lua_State* L)
+{
+    honey_glm_array *self;
+    honey_lua_parse_arguments(L, 1, 1, HONEY_USERDATA, &self);
+
+    glm_vec4_one(self->data);
+    return 0;
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+int honey_glm_vec4_dot(lua_State* L)
+{
+    honey_glm_array *a, *b;
+    honey_lua_parse_arguments
+	(L, 1, 2,
+	 HONEY_USERDATA, &a,
+	 HONEY_USERDATA, &b);
+
+    if (b->type != VEC4)
+	honey_lua_throw_error(L, "destination must be VEC4 (%d); got %d instead",
+			      VEC4, b->type);
+
+    float result = glm_vec4_dot(a->data, b->data);
+
+    lua_pushnumber(L, result);
+    return 1;
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+static bool get_vec4_arrays(lua_State* L,
+			    honey_glm_array** a,
+			    honey_glm_array** b,
+			    honey_glm_array** dest)
+{
+    int choice = honey_lua_parse_arguments
+	(L, 2,
+	 2, HONEY_USERDATA, a, HONEY_USERDATA, b,
+	 3, HONEY_USERDATA, a, HONEY_USERDATA, b, HONEY_USERDATA, dest);
+
+    if ((*b)->type != VEC4)
+	honey_lua_throw_error
+	    (L, "second argument must be VEC4 (%d); got %d instead",
+	     VEC4, (*b)->type);
+
+    if (choice == 1) {
+	if ((*dest)->type != VEC4)
+	    honey_lua_throw_error
+		(L, "third argument must be VEC4 (%d); got %d instead",
+		 VEC4, (*dest)->type);
+    }
+    else {
+	honey_glm_new_vec4(L);
+	*dest = lua_touserdata(L, -1);
+    }
+
+    return choice == 0;
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+static bool get_vec4_scalars(lua_State* L,
+			     honey_glm_array** a,
+			     float* s,
+			     honey_glm_array** dest)
+{
+    int choice = honey_lua_parse_arguments
+	(L, 2,
+	 2, HONEY_USERDATA, a, HONEY_NUMBER, s,
+	 3, HONEY_USERDATA, a, HONEY_NUMBER, s, HONEY_USERDATA, dest);
+
+    if (choice == 1) {
+	if ((*dest)->type != VEC4)
+	    honey_lua_throw_error
+		(L, "third argument must be VEC4 (%d); got %d instead",
+		 VEC4, (*dest)->type);
+    }
+    else {
+	honey_glm_new_vec4(L);
+	*dest = lua_touserdata(L, -1);
+    }
+
+    return choice == 0;
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+int honey_glm_vec4_norm2(lua_State* L)
+{
+    honey_glm_array *self;
+    honey_lua_parse_arguments(L, 1, 1, HONEY_USERDATA, &self);
+    float result = glm_vec4_norm2(self->data);
+    lua_pushnumber(L, result);
+    return 1;
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+int honey_glm_vec4_norm(lua_State* L)
+{
+    honey_glm_array *self;
+    honey_lua_parse_arguments(L, 1, 1, HONEY_USERDATA, &self);
+    float result = glm_vec4_norm(self->data);
+    lua_pushnumber(L, result);
+    return 1;
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+int honey_glm_vec4_add(lua_State* L)
+{
+    honey_glm_array *a, *b, *dest;
+    bool new_dest = get_vec4_arrays(L, &a, &b, &dest);
+    
+    glm_vec4_add(a->data, b->data, dest->data);
+
+    if (new_dest)
+	return 1;
+    return 0;
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+int honey_glm_vec4_adds(lua_State* L)
+{
+    honey_glm_array *self, *dest;
+    float s;
+    bool new_dest = get_vec4_scalars(L, &self, &s, &dest);
+
+    glm_vec4_adds(self->data, s, dest->data);
+
+    if (new_dest)
+	return 1;
+    return 0;
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+int honey_glm_vec4_sub(lua_State* L)
+{
+    honey_glm_array *a, *b, *dest;
+    bool new_dest = get_vec4_arrays(L, &a, &b, &dest);
+    
+    glm_vec4_sub(a->data, b->data, dest->data);
+
+    if (new_dest)
+	return 1;
+    return 0;
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+int honey_glm_vec4_subs(lua_State* L)
+{
+    honey_glm_array *self, *dest;
+    float s;
+    bool new_dest = get_vec4_scalars(L, &self, &s, &dest);
+
+    glm_vec4_subs(self->data, s, dest->data);
+
+    if (new_dest)
+	return 1;
+    return 0;
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+int honey_glm_vec4_mul(lua_State* L)
+{
+    honey_glm_array *a, *b, *dest;
+    bool new_dest = get_vec4_arrays(L, &a, &b, &dest);
+    
+    glm_vec4_mul(a->data, b->data, dest->data);
+
+    if (new_dest)
+	return 1;
+    return 0;
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+int honey_glm_vec4_scale(lua_State* L)
+{
+    honey_glm_array *self, *dest;
+    float s;
+    bool new_dest = get_vec4_scalars(L, &self, &s, &dest);
+
+    glm_vec4_scale(self->data, s, dest->data);
+
+    if (new_dest)
+	return 1;
+    return 0;
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+int honey_glm_vec4_scale_as(lua_State* L)
+{
+    honey_glm_array *self, *dest;
+    float s;
+    bool new_dest = get_vec4_scalars(L, &self, &s, &dest);
+
+    glm_vec4_scale_as(self->data, s, dest->data);
+
+    if (new_dest)
+	return 1;
+    return 0;
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+int honey_glm_vec4_div(lua_State* L)
+{
+    honey_glm_array *a, *b, *dest;
+    bool new_dest = get_vec4_arrays(L, &a, &b, &dest);
+    
+    glm_vec4_div(a->data, b->data, dest->data);
+
+    if (new_dest)
+	return 1;
+    return 0;
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+int honey_glm_vec4_negate(lua_State* L)
+{
+    honey_glm_array *self, *dest;
+    int choice = honey_lua_parse_arguments
+	(L, 2,
+	 1, HONEY_USERDATA, &self,
+	 2, HONEY_USERDATA, &self, HONEY_USERDATA, &dest);
+
+    if (choice == 0)
+	glm_vec4_negate(self->data);
+    else
+	glm_vec4_negate_to(self->data, dest->data);
+    return 0;
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+int honey_glm_vec4_normalize(lua_State* L)
+{
+    honey_glm_array *self, *dest;
+    int choice = honey_lua_parse_arguments
+	(L, 2,
+	 1, HONEY_USERDATA, &self,
+	 2, HONEY_USERDATA, &self, HONEY_USERDATA, &dest);
+
+    if (choice == 0)
+	glm_vec4_normalize(self->data);
+    else
+	glm_vec4_normalize_to(self->data, dest->data);
+    return 0;
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+int honey_glm_vec4_clamp(lua_State* L)
+{
+    honey_glm_array* self;
+    float min, max;
+    honey_lua_parse_arguments(L, 1, 3,
+			      HONEY_USERDATA, &self,
+			      HONEY_NUMBER, &min,
+			      HONEY_NUMBER, &max);
+
+    glm_vec4_clamp(self->data, min, max);
+    return 0;
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+int honey_glm_vec4_lerp(lua_State* L)
+{
+    honey_glm_array *a, *b, *dest;
+    float s;
+    int choice = honey_lua_parse_arguments
+	(L, 2,
+	 3, HONEY_USERDATA, &a, HONEY_USERDATA, &b, HONEY_NUMBER, &s,
+	 4, HONEY_USERDATA, &a, HONEY_USERDATA, &b, HONEY_NUMBER, &s, HONEY_USERDATA, &dest);
+
+    if (b->type != VEC4)
+	honey_lua_throw_error
+	    (L, "second argument must be VEC4 (%d); got %d instead",
+	     VEC4, b->type);
+
+    if (choice == 1) {
+	if (dest->type != VEC4)
+	    honey_lua_throw_error
+		(L, "fourth argument must be VEC4 (%d); got %d instead",
+		 VEC4, dest->type);
+    }
+    else {
+	honey_glm_new_vec4(L);
+	dest = lua_touserdata(L, -1);
+    }
+	
+    glm_vec4_lerp(a->data, b->data, s, dest->data);
+
+    if (choice == 0)
+	return 1;
+    return 0;
+}