implement basic vector bindings

2 files changed, 130 insertions, 0 deletions

diff --git a/demo/vector/common.lua b/demo/vector/common.lua
new file mode 100644
index 0000000..7ddd487
--- /dev/null
+++ b/demo/vector/common.lua
@@ -0,0 +1,80 @@
+honey.run = function()
+	local gl = honey.gl
+	local window = honey.window
+
+	-- initialize opengl
+	gl.Init()
+	window.setHint(window.hintType.contextVersionMajor, 3)
+	window.setHint(window.hintType.contextVersionMinor, 3)
+	
+	local win = window.create(640, 480, 'first person demo')
+	honey.window.win = win
+	window.makeContextCurrent(win)
+	gl.InitGlad()
+	gl.Enable(gl.DEPTH_TEST)
+
+	if honey.init then
+		honey.init()
+	end
+
+	window.setFramebufferSizeCallback(win, function(_, width, height)
+		if honey.windowSizeCallback then
+			honey.windowSizeCallback(width, height)
+		end
+	end)
+
+	local time = 0
+	drawTime = 1/60
+	while not window.shouldClose(win) do
+		local t = window.getTime()
+		local dt = t-time
+		time = t
+
+		honey.update(dt)
+		window.pollEvents()
+
+		if time > drawTime then
+			if honey.clearColor then
+				gl.ClearColor(
+					honey.clearColor.r,
+					honey.clearColor.g,
+					honey.clearColor.b,
+					1.0
+				)
+			else
+				gl.ClearColor(0.2, 0.3, 0.3, 1.0)
+			end
+			gl.Clear(gl.COLOR_BUFFER_BIT + gl.DEPTH_BUFFER_BIT)
+			honey.draw()
+			window.swapBuffers(win)
+			drawTime = drawTime + 1/60
+		end
+	end
+
+	window.destroy(win)
+	gl.Terminate()
+end
+
+
+local set = honey.glm.vec3_set
+local get = honey.glm.vec3_get
+function honey.glm.setVector(vec, x, y, z)
+	set(vec, 0, x)
+	set(vec, 1, y)
+	set(vec, 2, z)
+end
+
+
+function honey.glm.makeVector(x, y, z)
+	local v = honey.glm.vec3()
+	honey.glm.setVector(v, x, y, z)
+	return v
+end
+
+
+function honey.glm.vec3_tostring(v)
+	return string.format(
+		'[%0.2f, %0.2f, %0.2f]',
+		get(v, 0), get(v, 1), get(v, 2)
+	)
+end
diff --git a/demo/vector/main.lua b/demo/vector/main.lua
new file mode 100644
index 0000000..595131b
--- /dev/null
+++ b/demo/vector/main.lua
@@ -0,0 +1,50 @@
+require 'common'
+
+local window = honey.window
+local nvg = honey.nvg
+
+
+local vg
+
+function honey.init()
+	vg = nvg.Context()
+end
+
+
+local time = 0
+local frames = 0
+function honey.update(dt)
+	if window.getKey(window.win, window.KEY_ESCAPE) == window.PRESS then
+		window.setShouldClose(honey.window.win, true)
+	end
+	
+	time = time + dt
+	frames = frames + 1
+	if time > 5 then
+		print('fps:', frames/5)
+		frames = 0
+		time = time - 5
+	end
+end
+
+
+function honey.draw()
+	nvg.BeginFrame(vg, 640, 480, 1.0)
+	nvg.StrokeWidth(vg, 20)
+	nvg.StrokeColor(vg, 1, 0, 0, 1)
+
+	local w = 640
+	local h = 480
+
+	nvg.BeginPath(vg)
+	nvg.MoveTo(vg, w*0.2, h*.5)
+	nvg.LineTo(vg, w*0.4, h * (0.5 + 0.5*math.sin(math.pi * time)));
+	nvg.LineTo(vg, w*0.6, h * (0.5 - 0.5*math.sin(math.pi * time)));
+	nvg.LineTo(vg, w*0.8, h*.5)
+	nvg.Stroke(vg)
+
+	nvg.EndFrame(vg)
+end
+
+
+honey.run()