camera_set_view_mat


Description

This function will set the view matrix for a given camera. You give the unique camera ID value (as returned by the different camera_create functions) and a view matrix to be applied. You can find out more about creating view matrices from the section Matrix Functions, specifically matrix_build_lookat. Note that if your camera does automatic object tracking - ie: it has been created using camera_create_view with an object index / instance ID that isn't -1, or you are setting a camera defined in the Room Editor, or you are setting the default camera - then this matrix will get overwritten the next game frame.


Syntax:

camera_set_view_mat(camera_id, matrix)


Arguments:

Argument Description
camera_id The unique camera ID value returned when you created the camera.
matrix The unique matrix ID returned when you created the matrix.


Returns:

N/A


Example:

view_camera[0] = camera_create();
var viewmat = matrix_build_lookat(640, 240, -10, 640, 240, 0, 0, 1, 0);
var projmat = matrix_build_projection_ortho(640, 480, 1.0, 32000.0);
camera_set_view_mat(view_camera[0], viewmat);
camera_set_proj_mat(view_camera[0], projmat);

The above code creates a new camera and assigns it to view port[0]. This camera then has its view and projection matrices set.


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