Ilia Denisov
93 lines
1.9 KiB
Go
93 lines
1.9 KiB
Go
package world
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import (
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"testing"
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"github.com/stretchr/testify/require"
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)
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func TestClampCameraNoWrapViewport_ClampsToKeepViewportInsideWorld(t *testing.T) {
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t.Parallel()
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worldW := 100 * SCALE
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worldH := 100 * SCALE
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zoomFp := SCALE // 1.0x
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// viewport 40px => span 40 units => half 20.
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viewportW, viewportH := 40, 40
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// Too far left/up => clamp to minCam=20
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cx, cy := ClampCameraNoWrapViewport(
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0, 0,
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viewportW, viewportH,
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zoomFp,
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worldW, worldH,
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)
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require.Equal(t, 20*SCALE, cx)
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require.Equal(t, 20*SCALE, cy)
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// Too far right/down => clamp to maxCam=world-half=80
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cx, cy = ClampCameraNoWrapViewport(
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99*SCALE, 99*SCALE,
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viewportW, viewportH,
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zoomFp,
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worldW, worldH,
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)
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require.Equal(t, 80*SCALE, cx)
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require.Equal(t, 80*SCALE, cy)
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// Inside range => unchanged
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cx, cy = ClampCameraNoWrapViewport(
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50*SCALE, 60*SCALE,
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viewportW, viewportH,
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zoomFp,
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worldW, worldH,
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)
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require.Equal(t, 50*SCALE, cx)
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require.Equal(t, 60*SCALE, cy)
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}
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func TestClampCameraNoWrapViewport_WhenViewportLargerThanWorld_ForcesCenter(t *testing.T) {
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t.Parallel()
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worldW := 50 * SCALE
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worldH := 50 * SCALE
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zoomFp := SCALE
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// viewport 60px => span 60 units > world 50
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viewportW, viewportH := 60, 60
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cx, cy := ClampCameraNoWrapViewport(
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0, 0,
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viewportW, viewportH,
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zoomFp,
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worldW, worldH,
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)
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require.Equal(t, worldW/2, cx)
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require.Equal(t, worldH/2, cy)
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}
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func TestWorldClampRenderParamsNoWrap_UsesViewportClamp(t *testing.T) {
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t.Parallel()
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w := NewWorld(100, 100)
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p := RenderParams{
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ViewportWidthPx: 40,
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ViewportHeightPx: 40,
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MarginXPx: 10,
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MarginYPx: 10,
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CameraZoom: 1.0,
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CameraXWorldFp: 0,
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CameraYWorldFp: 0,
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Options: &RenderOptions{DisableWrapScroll: true},
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}
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w.ClampRenderParamsNoWrap(&p)
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// viewport half is 20, not 30 (margins ignored)
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require.Equal(t, 20*SCALE, p.CameraXWorldFp)
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require.Equal(t, 20*SCALE, p.CameraYWorldFp)
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}
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