42 lines
1.4 KiB
Markdown
42 lines
1.4 KiB
Markdown
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# Spec Delta
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## Purpose
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Defines how the arena default size is derived from the output and how resizing affects the grid.
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## ADDED Requirements
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### Requirement: Default arena is about 80% of output
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The system SHALL compute the default logical window size as 80% of the output mode dimensions divided by the active scale.
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#### Scenario: Output available
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- **WHEN** output mode and scale are known at startup
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- **THEN** the default logical window size is approximately 80% of the output
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### Requirement: Fallback when output unknown
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The system SHALL use a fallback default size when output info is unavailable.
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#### Scenario: No output info
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- **WHEN** output mode is not reported
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- **THEN** a fallback logical size is used
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### Requirement: Cell size remains 8 logical pixels
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The system SHALL keep an 8 logical pixel cell size.
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#### Scenario: Grid dimensions
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- **WHEN** the logical window size is known
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- **THEN** grid columns and rows are logical size divided by 8
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### Requirement: Resizable window
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The system SHALL allow the window to be resized by the user.
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#### Scenario: Resize
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- **WHEN** the user resizes the window
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- **THEN** the grid dimensions update accordingly
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### Requirement: Grid preserved on resize
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The system SHALL preserve overlapping cells when the grid dimensions change.
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#### Scenario: Enlarge
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- **WHEN** the window grows
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- **THEN** existing cells within the old bounds remain
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