func (t *TestSuite) TestScaledBox() {
filename := "expected_box_scaled.png"
t.rlControl.drawFunc <- func() {
w, h := t.renderState.window.GetSize()
world := newWorld(w, h)
box := shapes.NewBox(t.renderState.boxProgram, 100, 100)
// Color is yellow
box.SetColor(color.RGBA{0, 0, 255, 255})
box.AttachToWorld(world)
box.MoveTo(float32(w/2), 0)
box.Scale(1.5, 1.5)
gl.Clear(gl.COLOR_BUFFER_BIT)
box.Draw()
t.testDraw <- testlib.Screenshot(t.renderState.window)
t.renderState.window.SwapBuffers()
}
distance, exp, act, err := testlib.TestImage(filename, <-t.testDraw, imagetest.Center)
if err != nil {
panic(err)
}
t.True(distance < distanceThreshold, distanceError(distance, filename))
if t.Failed() {
saveExpAct(t.outputPath, "failed_"+filename, exp, act)
}
}
func (t *TestSuite) TestRotatedBox() {
filename := "expected_box_rotated_20.png"
t.rlControl.drawFunc <- func() {
w, h := t.renderState.window.GetSize()
world := newWorld(w, h)
// Create a 100x100 pixel² box
box := shapes.NewBox(t.renderState.boxProgram, 100, 100)
box.AttachToWorld(world)
// Place the box at the center of the screen
box.MoveTo(float32(w/2), 0)
// Rotate the box 20 degrees
box.Rotate(20.0)
gl.Clear(gl.COLOR_BUFFER_BIT)
box.Draw()
t.testDraw <- testlib.Screenshot(t.renderState.window)
t.renderState.window.SwapBuffers()
}
distance, exp, act, err := testlib.TestImage(filename, <-t.testDraw, imagetest.Center)
if err != nil {
panic(err)
}
t.True(distance < distanceThreshold, distanceError(distance, filename))
if t.Failed() {
saveExpAct(t.outputPath, "failed_"+filename, exp, act)
}
}
func (t *TestSuite) TestGroup() {
filename := "expected_group.png"
t.rlControl.drawFunc <- func() {
w, h := t.renderState.window.GetSize()
world := newWorld(w, h)
// Create first group, 2 small boxes
group1 := shapes.NewGroup()
b1 := shapes.NewBox(t.renderState.boxProgram, 20, 20)
b1.MoveTo(30, 40)
b2 := shapes.NewBox(t.renderState.boxProgram, 50, 50)
b2.MoveTo(45, -25)
b2.Rotate(20.0)
group1.Append(b1)
group1.Append(b2)
// Create the main group
group := shapes.NewGroup()
group.Append(group1)
group.Append(shapes.NewBox(t.renderState.boxProgram, 100, 100))
// Get the second element of the group
b3 := group.GetAt(1)
b3.MoveTo(float32(w/2), 0)
group.AttachToWorld(world)
gl.Clear(gl.COLOR_BUFFER_BIT)
group.Draw()
t.testDraw <- testlib.Screenshot(t.renderState.window)
t.renderState.window.SwapBuffers()
}
distance, exp, act, err := testlib.TestImage(filename, <-t.testDraw, imagetest.Center)
if err != nil {
panic(err)
}
t.True(distance < distanceThreshold, distanceError(distance, filename))
if t.Failed() {
saveExpAct(t.outputPath, "failed_"+filename, exp, act)
}
}
func (t *TestSuite) TestRenderWorld() {
filename := "expected_world.png"
t.rlControl.drawFunc <- func() {
// initialize the default source to a deterministic
// state
rand.Seed(1234)
state := lib.NewGameState(t.renderState.window)
state.Draw()
t.testDraw <- testlib.Screenshot(t.renderState.window)
t.renderState.window.SwapBuffers()
}
distance, exp, act, err := testlib.TestImage(filename, <-t.testDraw, imagetest.Center)
if err != nil {
panic(err)
}
t.True(distance < distanceThreshold, distanceError(distance, filename))
if t.Failed() {
saveExpAct(t.outputPath, "failed_"+filename, exp, act)
}
}
func (t *TestSuite) TestPartialTextureRotatedBox() {
filename := "expected_box_partial_texture_rotated_20.png"
t.rlControl.drawFunc <- func() {
w, h := t.renderState.window.GetSize()
world := newWorld(w, h)
// Create a box
box := shapes.NewBox(t.renderState.boxProgram, 100, 100)
box.AttachToWorld(world)
gl.Clear(gl.COLOR_BUFFER_BIT)
box.MoveTo(float32(w/2), 0)
// Add an image as a texture
gopherTexture := world.addImageAsTexture(texFilename)
texCoords := []float32{
0, 0,
0.5, 0,
0, 0.5,
0.5, 0.5,
}
box.SetTexture(gopherTexture, texCoords)
box.Rotate(20.0)
box.Draw()
t.testDraw <- testlib.Screenshot(t.renderState.window)
t.renderState.window.SwapBuffers()
}
distance, exp, act, err := testlib.TestImage(filename, <-t.testDraw, imagetest.Center)
if err != nil {
panic(err)
}
t.True(distance < texDistThreshold, distanceError(distance, filename))
if t.Failed() {
saveExpAct(t.outputPath, "failed_"+filename, exp, act)
}
}
func (t *TestSuite) TestTranslatedBox() {
filename := "expected_box_translated_10_10.png"
t.rlControl.drawFunc <- func() {
w, h := t.renderState.window.GetSize()
world := newWorld(w, h)
// Place a box on the center of the window
box := shapes.NewBox(t.renderState.boxProgram, 100, 100)
box.AttachToWorld(world)
box.MoveTo(111, 0)
gl.Clear(gl.COLOR_BUFFER_BIT)
box.Draw()
t.testDraw <- testlib.Screenshot(t.renderState.window)
t.renderState.window.SwapBuffers()
}
distance, exp, act, err := testlib.TestImage(filename, <-t.testDraw, imagetest.Center)
if err != nil {
panic(err)
}
t.True(distance < distanceThreshold, distanceError(distance, filename))
if t.Failed() {
saveExpAct(t.outputPath, "failed_"+filename, exp, act)
}
}
func (t *TestSuite) TestRotate() {
filename := "expected_hello_world_rotated.png"
t.rlControl.drawFunc <- func() {
w, h := t.renderState.window.GetSize()
world := newWorld(w, h)
// Render an "Hello World" string
text, err := world.font.Printf("%s", "Hello World!")
if err != nil {
panic(err)
}
text.AttachToWorld(world)
text.MoveTo(float32(world.width/2)+5, -5.0)
text.Rotate(45)
gl.Enable(gl.BLEND)
gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)
gl.Clear(gl.COLOR_BUFFER_BIT)
text.Draw()
t.testDraw <- testlib.Screenshot(t.renderState.window)
t.renderState.window.SwapBuffers()
}
distance, exp, act, err := testlib.TestImage(filename, <-t.testDraw, imagetest.Center)
if err != nil {
panic(err)
}
t.True(distance < distanceThreshold, distanceError(distance, filename))
if t.Failed() {
saveExpAct(t.outputPath, "failed_"+filename, exp, act)
}
}
func (t *TestSuite) TestSegment() {
filename := "expected_line.png"
t.rlControl.drawFunc <- func() {
w, h := t.renderState.window.GetSize()
world := newWorld(w, h)
segment := shapes.NewSegment(t.renderState.segmentProgram, 81.5, -40, 238.5, 44)
// Color is yellow
segment.SetColor(color.RGBA{255, 0, 0, 255})
segment.AttachToWorld(world)
gl.Clear(gl.COLOR_BUFFER_BIT)
segment.Draw()
t.testDraw <- testlib.Screenshot(t.renderState.window)
t.renderState.window.SwapBuffers()
}
distance, exp, act, err := testlib.TestImage(filename, <-t.testDraw, imagetest.Center)
if err != nil {
panic(err)
}
t.True(distance < 0.0009, distanceError(distance, filename))
if t.Failed() {
saveExpAct(t.outputPath, "failed_"+filename, exp, act)
}
}
// Run runs renderLoop. The loop renders a frame and swaps the buffer
// at each tick received.
func (t *TestSuite) renderLoopFunc(control *renderLoopControl) loop.LoopFunc {
return func(loop loop.Loop) error {
// renderState stores rendering state variables such
// as the EGL state
renderState := new(renderState)
// Lock/unlock the loop to the current OS thread. This is
// necessary because OpenGL functions should be called from
// the same thread.
runtime.LockOSThread()
defer runtime.UnlockOSThread()
// Create an instance of ticker and immediately stop
// it because we don't want to swap buffers before
// initializing a rendering state.
ticker := time.NewTicker(1)
ticker.Stop()
for {
select {
case window := <-control.window:
renderState.init(window)
// restart the ticker with the right
// duration
ticker = time.NewTicker(time.Duration(time.Second / time.Duration(FramesPerSecond)))
// At each tick render a frame and swap buffers.
case <-ticker.C:
renderState.draw()
renderState.window.SwapBuffers()
t.testDraw <- testlib.Screenshot(renderState.window)
}
}
}
}