Noah Petherbridge
08e65c32b5
* Player character now experiences acceleration and friction when walking around the map! * Actor position and movement had to be converted from int's (render.Point) to float64's to support fine-grained acceleration steps. * Added "physics" package and physics.Vector to be a float64 counterpart for render.Point. Vector is used for uix.Actor.Position() for the sake of movement math. Vector is flattened back to a render.Point for collision purposes, since the levels and hitboxes are pixel-bound. * Refactor the uix.Actor to no longer extend the doodads.Drawing (so it can have a Position that's a Vector instead of a Point). This broke some code that expected `.Doodad` to directly reference the Drawing.Doodad: now you had to refer to it as `a.Drawing.Doodad` which was ugly. Added convenience method .Doodad() for a shortcut. * Moved functions like GetBoundingRect() from doodads package to collision, where it uses its own slimmer Actor interface for just the relevant methods it needs.
54 lines
1.1 KiB
Go
54 lines
1.1 KiB
Go
package physics_test
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import (
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"testing"
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"git.kirsle.net/apps/doodle/pkg/physics"
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"git.kirsle.net/go/render"
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)
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// Test converting points to vectors and back again.
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func TestVectorPoint(t *testing.T) {
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var tests = []struct {
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In render.Point
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Mid physics.Vector
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Add physics.Vector
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Out render.Point
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}{
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{
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In: render.NewPoint(102, 102),
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Mid: physics.NewVector(102.0, 102.0),
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Out: render.NewPoint(102, 102),
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},
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{
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In: render.NewPoint(64, 128),
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Mid: physics.NewVector(64.0, 128.0),
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Add: physics.NewVector(0.4, 0.6),
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Out: render.NewPoint(64, 129),
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},
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}
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for _, test := range tests {
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// Convert point to vector.
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v := physics.VectorFromPoint(test.In)
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if v != test.Mid {
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t.Errorf("Unexpected Vector from Point(%s): wanted %s, got %s",
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test.In, test.Mid, v,
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)
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continue
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}
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// Add other vector.
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v.Add(test.Add)
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// Verify output point rounded down correctly.
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out := v.ToPoint()
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if out != test.Out {
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t.Errorf("Unexpected output vector from Point(%s) -> V(%s) + V(%s): wanted %s, got %s",
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test.In, test.Mid, test.Add, test.Out, out,
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)
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continue
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}
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}
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}
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