45 lines
728 B
Odin
45 lines
728 B
Odin
package main
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import "core:slice"
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StateVariant :: union{^Game, ^Menu, ^Pause, ^GameOver, ^Winning}
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GameState :: struct {
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update: proc(state: ^GameState, delta: f32),
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draw: proc(state: ^GameState),
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free: proc(state: ^GameState),
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previous: ^GameState,
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variant: StateVariant
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}
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new_state :: proc($T: typeid) -> ^T {
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state := new(T)
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state.variant = state
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return state
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}
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state_stack : [dynamic]^GameState
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stack_push :: proc(state: ^GameState) -> (bool) {
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append(&state_stack, state)
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return true
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}
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stack_pop :: proc() -> (bool) {
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if len(state_stack) == 0 {
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return false
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}
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state := pop(&state_stack)
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state->free()
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return true
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}
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stack_top :: proc() -> ^GameState {
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return state_stack[len(state_stack)-1]
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}
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