Initial commitHEADmaster

1 files changed, 75 insertions, 0 deletions

diff --git a/src/shaders/stars.lua b/src/shaders/stars.lua
new file mode 100644
index 0000000..3e4138e
--- /dev/null
+++ b/src/shaders/stars.lua
@@ -0,0 +1,75 @@
+local win = require("window")
+local color = require("color")
+local world = require("world")
+local shim = require("shader_shim")
+local numstars = 500 -- we might have as many as 4 over
+local genned_stars = 0
+local period_x = 3
+local period_y = 3
+local stars = {}
+local tries = 0
+aspect = win.width / win.height
+while genned_stars < numstars and tries < 100000 do
+	local rngx = math.random()
+	local xpos = rngx * win.width --* (period_x - 1)
+	local rngy = math.random()
+	local ypos = rngy * win.height --* (period_y - 1)
+	local blinks = math.random() > 0.3 and (math.random() * 2 * math.pi) or 0
+	--if math.distance(vec2(rngx,rngy), vec2(0.53,0.5)) > 0.5 then
+	local off = vec2(math.abs(rngx - 0.50) * aspect, math.abs(rngy-0.5))
+	if math.length(off) > 0.5 then
+		stars[#stars+1] = vec3(xpos, ypos, blinks)
+		genned_stars = genned_stars + 1
+		if xpos < win.width then
+			-- duplicate on the last screen
+			stars[#stars+1] = vec3(xpos + (win.width * (period_x-2)), ypos, blinks)
+			genned_stars = genned_stars + 1
+		end
+		if ypos < win.height then
+			stars[#stars+1] = vec3(xpos, ypos + (win.height * (period_y-2)), blinks)
+			genned_stars = genned_stars + 1
+		end
+		if xpos < win.width and ypos < win.height then
+			stars[#stars+1] = vec3(xpos + (win.width * (period_x-2)), ypos+(win.height * (period_y-2)),blinks)
+			genned_stars = genned_stars + 1
+		end
+	end
+	tries = tries + 1
+end
+assert(genned_stars == numstars, "Failed to generate stars")
+local node = am.blend("premult") ^ shim.stars
+^ am.bind({
+	MV = mat4(
+		1, 0, 0, 0,
+		0, 1, 0, 0,
+		0, 0, 1, 0,
+		(-win.width / 2), (-win.height/2), 0, 1
+	),
+	color = color.am_color.highlight,
+	stars = am.vec3_array(stars),
+	world_x = am.current_time(),
+	world_x_period = (period_x - 2) * win.width,
+	world_y = am.current_time(),
+	world_y_period = (period_y - 2) * win.height,
+	time = am.current_time(),
+	lamp1 = vec3(0),
+	lamp2 = vec3(0),
+	lamp3 = vec3(0),
+	lamp4 = vec3(0),
+	lamp5 = vec3(0),
+	lamp6 = vec3(0),
+	lamp7 = vec3(0),
+	lamp8 = vec3(0)
+})
+^ am.draw("points")
+node:action(function(self)
+	self("bind").time = am.current_time()
+	self("bind").world_x = world.world_x
+	self("bind").world_y = world.world_y
+	local lamps = world.level.lamps_on_screen()
+	for i,v in pairs(lamps) do
+		print("Setting lamp", i, "to", v)
+		self("bind")["lamp" .. tostring(i)] = v
+	end
+end)
+return node