mirror of https://github.com/liamg/aminal.git
55 lines
1.0 KiB
Go
55 lines
1.0 KiB
Go
// Copyright 2018 The go-gl Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.package mgl64_test
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package mgl32
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import (
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"testing"
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)
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func TestScreenToGLCoords(t *testing.T) {
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// use a small screen size in order to minimize errors due to fp rounding.
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const (
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sw = 100
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sh = 100
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)
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x, y := ScreenToGLCoords(0, sh-1, sw, sh)
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if x != -1 {
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t.Errorf("x = %f, expected -1.0", x)
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}
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if y != -1 {
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t.Errorf("y = %f, expected -1.0", y)
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}
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x, y = ScreenToGLCoords(sw-1, 0, sw, sh)
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if x != 1 {
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t.Errorf("x = %f, expected 1.0", x)
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}
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if y != 1 {
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t.Errorf("y = %f, expected 1.0", y)
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}
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}
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func TestGLToScreenCoords(t *testing.T) {
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const (
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sw = 100
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sh = 100
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)
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x, y := GLToScreenCoords(-1, -1, sw, sh)
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if x != 0 {
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t.Errorf("x = %d, expected 0", x)
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}
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if y != sh-1 {
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t.Errorf("y = %d, expected %d", y, sh-1)
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}
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x, y = GLToScreenCoords(1, 1, sw, sh)
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if x != sw-1 {
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t.Errorf("x = %d, expected %d", x, sw-1)
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}
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if y != 0 {
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t.Errorf("y = %d, expected 0", y)
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}
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}
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