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physics_kapla.py
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physics_kapla.py
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# Physics kapla towers
import harfang as hg
from math import pi, cos, sin, asin
hg.InputInit()
hg.WindowSystemInit()
res_x, res_y = 1280, 720
win = hg.RenderInit('Harfang - Kapla - Press SPACEBAR', res_x, res_y, hg.RF_VSync | hg.RF_MSAA4X)
hg.AddAssetsFolder('resources_compiled')
pipeline = hg.CreateForwardPipeline()
res = hg.PipelineResources()
# create models
vtx_layout = hg.VertexLayoutPosFloatNormUInt8()
sphere_mdl = hg.CreateSphereModel(vtx_layout, 0.5, 12, 24)
sphere_ref = res.AddModel('sphere', sphere_mdl)
# create materials
prg_ref = hg.LoadPipelineProgramRefFromAssets('core/shader/pbr.hps', res, hg.GetForwardPipelineInfo())
mat_cube = hg.CreateMaterial(prg_ref, 'uBaseOpacityColor', hg.Vec4I(255, 255, 56), 'uOcclusionRoughnessMetalnessColor', hg.Vec4(1, 0.658, 1))
mat_ground = hg.CreateMaterial(prg_ref, 'uBaseOpacityColor', hg.Vec4I(171, 255, 175), 'uOcclusionRoughnessMetalnessColor', hg.Vec4(1, 1, 1))
mat_spheres = hg.CreateMaterial(prg_ref, 'uBaseOpacityColor', hg.Vec4I(255, 71, 75), 'uOcclusionRoughnessMetalnessColor', hg.Vec4(1, 0.5, 0.1))
# setup scene
scene = hg.Scene()
scene.canvas.color = hg.ColorI(200, 210, 208)
scene.environment.ambient = hg.Color.Black
cam = hg.CreateCamera(scene, hg.Mat4.Identity, 0.01, 1000)
scene.SetCurrentCamera(cam)
lgt = hg.CreateLinearLight(scene, hg.TransformationMat4(hg.Vec3(0, 0, 0), hg.Deg3(19, 59, 0)), hg.Color(1.5, 0.9, 1.2, 1), hg.Color(1.5, 0.9, 1.2, 1), 10, hg.LST_Map, 0.002, hg.Vec4(8, 20, 40, 120))
back_lgt = hg.CreatePointLight(scene, hg.TranslationMat4(hg.Vec3(30, 20, 25)), 100, hg.Color(0.8, 0.5, 0.4, 1), hg.Color(0.8, 0.5, 0.4, 1), 0)
mdl_ref = res.AddModel('ground', hg.CreateCubeModel(vtx_layout, 200, 0.1, 200))
hg.CreatePhysicCube(scene, hg.Vec3(200, 0.1, 200), hg.TranslationMat4(hg.Vec3(0, -0.5, 0)), mdl_ref, [mat_ground], 0)
def add_kapla_tower(scn, resources, width, height, length, radius, material, level_count, x, y, z):
"""Create a Kapla tower, return a list of created nodes"""
level_y = y + height / 2
kapla_mdl = hg.CreateCubeModel(vtx_layout, width, height, length)
kapla_ref = resources.AddModel('kapla', kapla_mdl)
nodes = []
for i in range(level_count // 2):
def fill_ring(r, ring_y, size, r_adjust, y_off):
step = asin((size * 1.01) / 2 / (r - r_adjust)) * 2
cube_count = (2 * pi) // step
error = 2 * pi - step * cube_count
step += error / cube_count # distribute error
a = 0
while a < (2 * pi - error):
world = hg.TransformationMat4(hg.Vec3(cos(a) * r + x, ring_y, sin(a) * r + z), hg.Vec3(0, -a + y_off, 0))
node = hg.CreatePhysicCube(scn, hg.Vec3(width, height, length), world, kapla_ref, [material], 0.1)
nodes.append(node)
a += step
fill_ring(radius - length / 2, level_y, width, length / 2, pi / 2)
level_y += height
fill_ring(radius - length + width / 2, level_y, length, width / 2, 0)
fill_ring(radius - width / 2, level_y, length, width / 2, 0)
level_y += height
return nodes
add_kapla_tower(scene, res, 0.5, 2, 2, 6, mat_cube, 12, -12, 0, 0)
add_kapla_tower(scene, res, 0.5, 2, 2, 6, mat_cube, 12, 12, 0, 0)
clocks = hg.SceneClocks()
# input devices and fps controller states
keyboard = hg.Keyboard()
mouse = hg.Mouse()
cam_pos = hg.Vec3(28.3, 31.8, 26.9)
cam_rot = hg.Vec3(0.6, -2.38, 0)
# setup physics
physics = hg.SceneBullet3Physics()
physics.SceneCreatePhysicsFromAssets(scene)
physics_step = hg.time_from_sec_f(1 / 60)
# main loop
while not keyboard.Down(hg.K_Escape) and hg.IsWindowOpen(win):
keyboard.Update()
mouse.Update()
dt = hg.TickClock()
hg.FpsController(keyboard, mouse, cam_pos, cam_rot, 20 if keyboard.Down(hg.K_LShift) else 8, dt)
cam.GetTransform().SetPos(cam_pos)
cam.GetTransform().SetRot(cam_rot)
if keyboard.Pressed(hg.K_Space):
node = hg.CreatePhysicSphere(scene, 0.5, hg.TranslationMat4(cam_pos), sphere_ref, [mat_spheres], 0.5)
physics.NodeCreatePhysicsFromAssets(node)
physics.NodeAddImpulse(node, hg.GetZ(cam.GetTransform().GetWorld()) * 25.0, cam_pos)
hg.SceneUpdateSystems(scene, clocks, dt, physics, physics_step, 1)
hg.SubmitSceneToPipeline(0, scene, hg.IntRect(0, 0, res_x, res_y), True, pipeline, res)
hg.Frame()
hg.UpdateWindow(win)
hg.DestroyForwardPipeline(pipeline)
hg.RenderShutdown()
hg.DestroyWindow(win)