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Get point
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Definition
INT get_point ( <INT fileID> , <INT graphID> , <INT controlpointID> , <INT POINTER x>, <INT POINTER y>)
Allows you to obtain a control point of a particular graph.
Any graph can contain an undetermined number of control points where control point 0 is the center of the graphic. This function allows you to know the location of any control point belonging to any graph.
To set a control point, use set_point() or, for only the center of a graph, set_center().
Parameters
INT fileID | - Number of the FPG library. |
INT graphID | - Number of the graph inside the library which you want to use. |
INT controlpointID | - Number of the control point. |
INT POINTER x | - Pointer to where the X-coordinate of the control point will be written. |
INT POINTER y | - Pointer to where the Y-coordinate of the control point will be written. |
Returns
INT : Successrate
false | - One of the following: specified graph is invalid, specified control point is invalid, specified control point is undefined. |
true | - The control point was defined or the center was used. |
Example
Program cpoint; Private int map; int cx,cy; Begin // Create a red graph map = new_map(100,100,8); map_clear(0,map,rgb(255,0,0)); // Set the center to a random point set_center(0,map,rand(-10,110),rand(-10,110)); // Get the center get_point(0,map,0,&cx,&cy); // Show the center say("Center-X: " + cx); say("Center-Y: " + cy); // Assign the map to the graph variable graph = map; // Set the location of this process to the center of the screen x = 160; y = 100; Loop frame; End End
Used in example: new_map(), map_clear(), set_center(), say(), pointer, graph
Notice that setting the center influences the position of the graph:
Maps Functions | |
• Graphic_info() • Map_block_copy() • Map_clear() • Map_clone() • Map_put() • Map_put_pixel() • Map_xput() • Map_xputnp() • New_map() • Save_png() • Unload_map() • |