Add mouse

Author: warmist

projects/spirograph.lua

@@ -36,6 +36,7 @@ config=make_config({
 	{"R",400,type="int",min=0,max=max_size},
 	{"ticking",100,type="float",min=1,max=10000},
 	{"ticking2",100,type="float",min=1,max=10000},
+	{"dist",100,type="float",min=1,max=1000},
 },config)
 image_no=image_no or 0
 function draw_config( tbl )
@@ -98,10 +99,17 @@ function update(  )
 		img_buf:save("saved_"..image_no..".png","Saved by PixelDance")
 		image_no=image_no+1
 	end
+	local eps=0.000001
 	imgui.End()
 	for i=1,config.ticking do
 		local x,y=pos(tick/config.ticking2);
-		img_buf:set(x+s[1]/2,y+s[2]/2,c_u8)
+		local x2,y2=pos(tick/config.ticking2+eps);
+		local dx=x2-x
+		local dy=y2-y
+		local dl=math.sqrt(dx*dx+dy*dy)
+		local tx=dx/dl
+		local ty=dy/dl
+		img_buf:set(x+tx*config.dist+s[1]/2,y+ty*config.dist+s[2]/2,c_u8)
 		tick=tick+1
 	end
 	img_buf:present()

src/main.cpp

@@ -245,6 +245,26 @@ struct project {
         init_lua();
         reload_file();
     }
+	void set_mouse()
+	{
+		auto& io = ImGui::GetIO();
+		lua_newtable(L);
+
+		lua_pushnumber(L, io.MousePos.x);
+		lua_setfield(L, -2, "x");
+
+		lua_pushnumber(L, io.MousePos.y);
+		lua_setfield(L, -2, "y");
+		
+#define ADD_MOUSE(x) lua_pushboolean(L, io.MouseDownOwned[x]); lua_setfield(L, -2, "owned" ## # x); lua_pushboolean(L, io.MouseClicked[x]); lua_setfield(L, -2, "clicked" ## # x); lua_pushboolean(L, io.MouseReleased[x]); lua_setfield(L, -2, "released" ## # x)
+		ADD_MOUSE(0);
+		ADD_MOUSE(1);
+		ADD_MOUSE(2);
+		ADD_MOUSE(3);
+		ADD_MOUSE(4);
+#undef ADD_MOUSE
+		lua_setfield(L, LUA_GLOBALSINDEX, "__mouse");
+	}
 	void update()
 	{
 		if (is_errored)
@@ -390,6 +410,7 @@ int main(int argc, char** argv)
 
 		if(need_reload)
 			current_project.reload_file();
+		current_project.set_mouse();
 		current_project.update();
 
         ImGui::Begin("Projects");