add first person demo

1 files changed, 93 insertions, 0 deletions

diff --git a/demo/first_person/main.lua b/demo/first_person/main.lua
new file mode 100644
index 0000000..3f99ddf
--- /dev/null
+++ b/demo/first_person/main.lua
@@ -0,0 +1,93 @@
+require 'common'
+
+local window = honey.window
+local glm = honey.glm
+
+function makeVector(x, y, z)
+	local vec = honey.glm.vec3()
+	honey.glm.vec3_set(vec, 0, x)
+	honey.glm.vec3_set(vec, 1, y)
+	honey.glm.vec3_set(vec, 2, z) return vec
+end
+
+function printVector(vec)
+	local x = honey.glm.vec3_get(vec, 0)
+	local y = honey.glm.vec3_get(vec, 1)
+	local z = honey.glm.vec3_get(vec, 2)
+	print(string.format('[%0.2f, %0.2f, %0.2f]', x, y, z))
+end
+
+function pressed(key)
+	local win = honey.window.win
+	return window.getKey(win, key) == window.PRESS
+end
+
+local Shader = require 'shader'
+local Mesh = require 'mesh'
+local Camera = require 'camera'
+local Texture = require 'texture'
+
+
+local heightmap, camera, shader, texture
+
+function honey.init()
+	heightmap = Mesh.Load('heightmap.dae')
+	glm.rotate(heightmap.transform, math.rad(90), glm.makeVector(1, 0, 0))
+	camera = Camera(math.rad(45), 640/480, 0.1, 1000)
+	shader = Shader.Load('height.vs', 'height.fs')
+	texture = Texture.Load('grass3_by_RPG.png')
+
+	shader:SetTexture('grass', texture)
+
+	window.setInputMode(window.win, window.CURSOR, window.CURSOR_DISABLED)
+end
+
+function honey.windowSizeCallback(w, h)
+	print('hi')
+	honey.gl.Viewport(0, 0, w, h)
+	camera:updateRatio(w/h)
+end
+
+
+local mouse = { x=0, y=0, pitch=0, yaw=0 }
+local translation = honey.glm.vec3()
+function honey.update(dt)
+	if pressed(window.KEY_ESCAPE) then
+		window.setShouldClose(honey.window.win, true)
+	end
+
+	local mx, my = window.getCursorPos(honey.window.win)
+	local delta_mx, delta_my = mx - mouse.x, my - mouse.y
+	mouse.x = mx
+	mouse.y = my
+	mouse.yaw = mouse.yaw + delta_mx 
+	mouse.pitch = mouse.pitch - delta_my
+	if mouse.pitch < -89.999 then mouse.pitch = -89.999 end
+	if mouse.pitch > 89.999 then mouse.pitch = 89.999 end
+
+	camera:setAngles(mouse.yaw, mouse.pitch)
+
+	local cx, cy, cz = 0, 0, 0
+	if pressed(window.KEY_W) then cx= 1 
+	elseif pressed(window.KEY_S) then cx = -1 end
+	if pressed(window.KEY_A) then cz = -1
+	elseif pressed(window.KEY_D) then cz = 1 end
+
+	glm.setVector(translation, cx, cy, cz)
+	honey.glm.vec3_normalize(translation)
+	honey.glm.vec3_scale(translation, dt, translation)
+	camera:translate(translation)
+
+	camera:updateView()
+end
+
+function honey.draw()
+	shader:Use()
+	shader:SetMatrix('view', camera.view)
+	shader:SetMatrix('projection', camera.projection)
+	shader:SetMatrix('model', heightmap.transform)
+
+	heightmap:Draw()
+end
+
+honey.run()