down_cast

examples/demo.odin

@@ -9,20 +9,32 @@ main :: proc() {
 		name:      string
 	}
 
-	Frog :: type struct {
+	Amp :: type struct {
 		using entity: Entity
 		jump_height:  f32
 	}
-
-	f := Frog{}
-	f.name = "ribbit"
-
-	print_name :: proc(using e: Entity) {
-		print_string(name); nl()
+	Frog :: type struct {
+		using amp: Amp
+		volume: f64
 	}
 
-	print_name(f.entity)
-	print_name(f)
+	f := Frog{};
+	f.name = "ribbit";
+	f.jump_height = 1337;
+
+	e := ^f.entity;
+	parent := e down_cast ^Frog;
+
+	print_name :: proc(using e: Entity, v: Vec3) {
+		print_string(name); nl()
+		print_int(v.x as int); nl()
+	}
+
+	print_f32(f.jump_height); nl()
+	print_f32(parent.jump_height); nl()
+
+	print_name(f.entity, Vec3{1, 2, 3})
+	print_name(parent.entity, Vec3{3, 2, 1})
 
 
 }

examples/opengl.odin

@@ -27,23 +27,23 @@ GL_TEXTURE_MIN_FILTER  :: 0x2801
 GL_TEXTURE_WRAP_S      :: 0x2802
 GL_TEXTURE_WRAP_T      :: 0x2803
 
-glClear         :: proc(mask: u32) #foreign
-glClearColor    :: proc(r, g, b, a: f32) #foreign
-glBegin         :: proc(mode: i32) #foreign
-glEnd           :: proc() #foreign
-glColor3f       :: proc(r, g, b: f32) #foreign
-glColor4f       :: proc(r, g, b, a: f32) #foreign
-glVertex2f      :: proc(x, y: f32) #foreign
-glVertex3f      :: proc(x, y, z: f32) #foreign
-glTexCoord2f    :: proc(u, v: f32) #foreign
-glLoadIdentity  :: proc() #foreign
+glClear         :: proc(mask: u32)                                #foreign
+glClearColor    :: proc(r, g, b, a: f32)                          #foreign
+glBegin         :: proc(mode: i32)                                #foreign
+glEnd           :: proc()                                         #foreign
+glColor3f       :: proc(r, g, b: f32)                             #foreign
+glColor4f       :: proc(r, g, b, a: f32)                          #foreign
+glVertex2f      :: proc(x, y: f32)                                #foreign
+glVertex3f      :: proc(x, y, z: f32)                             #foreign
+glTexCoord2f    :: proc(u, v: f32)                                #foreign
+glLoadIdentity  :: proc()                                         #foreign
 glOrtho         :: proc(left, right, bottom, top, near, far: f64) #foreign
-glBlendFunc     :: proc(sfactor, dfactor: i32) #foreign
-glEnable        :: proc(cap: i32) #foreign
-glDisable       :: proc(cap: i32) #foreign
-glGenTextures   :: proc(count: i32, result: ^u32) #foreign
-glTexParameteri :: proc(target, pname, param: i32) #foreign
-glTexParameterf :: proc(target: i32, pname: i32, param: f32) #foreign
-glBindTexture   :: proc(target: i32, texture: u32) #foreign
+glBlendFunc     :: proc(sfactor, dfactor: i32)                    #foreign
+glEnable        :: proc(cap: i32)                                 #foreign
+glDisable       :: proc(cap: i32)                                 #foreign
+glGenTextures   :: proc(count: i32, result: ^u32)                 #foreign
+glTexParameteri :: proc(target, pname, param: i32)                #foreign
+glTexParameterf :: proc(target: i32, pname: i32, param: f32)      #foreign
+glBindTexture   :: proc(target: i32, texture: u32)                #foreign
 glTexImage2D    :: proc(target, level, internal_format, width, height, border, format, _type: i32, pixels: rawptr) #foreign