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physics_pool_of_objects.py
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physics_pool_of_objects.py
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# Physics cubes & spheres in a box.
import harfang as hg
hg.InputInit()
hg.WindowSystemInit()
res_x, res_y = 1280, 720
win = hg.RenderInit('Harfang - Physics Pool', 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)
cube_mdl = hg.CreateCubeModel(vtx_layout, 1, 1, 1)
cube_ref = res.AddModel('cube', cube_mdl)
# create materials
prg_ref = hg.LoadPipelineProgramRefFromAssets('core/shader/default.hps', res, hg.GetForwardPipelineInfo())
def create_material(diffuse, specular, self):
mat = hg.CreateMaterial(prg_ref, 'uDiffuseColor', diffuse, 'uSpecularColor', specular)
hg.SetMaterialValue(mat, 'uSelfColor', self)
return mat
mat_ground = create_material(hg.Vec4(0.5, 0.5, 0.5), hg.Vec4(0.1, 0.1, 0.1), hg.Vec4(0, 0, 0))
mat_walls = create_material(hg.Vec4(0.5, 0.5, 0.5), hg.Vec4(0.1, 0.1, 0.1), hg.Vec4(0, 0, 0))
mat_objects = create_material(hg.Vec4(0.5, 0.5, 0.5), hg.Vec4(1, 1, 1), hg.Vec4(0, 0, 0))
# setup scene
scene = hg.Scene()
scene.canvas.color = hg.ColorI(22, 56, 76)
scene.environment.fog_color = scene.canvas.color
scene.environment.fog_near = 20
scene.environment.fog_far = 80
cam_mtx = hg.TransformationMat4(hg.Vec3(0, 20, -30), hg.Deg3(30, 0, 0))
cam = hg.CreateCamera(scene, cam_mtx, 0.01, 5000)
scene.SetCurrentCamera(cam)
lgt = hg.CreateLinearLight(scene, hg.TransformationMat4(hg.Vec3(0, 0, 0), hg.Deg3(30, 59, 0)), hg.Color(1, 0.8, 0.7), hg.Color(1, 0.8, 0.7), 10, hg.LST_Map, 0.002, hg.Vec4(50, 100, 200, 400))
back_lgt = hg.CreatePointLight(scene, hg.TranslationMat4(hg.Vec3(0, 10, 10)), 100, hg.ColorI(94, 155, 228), hg.ColorI(94, 255, 228))
mdl_ref = res.AddModel('ground', hg.CreateCubeModel(vtx_layout, 100, 1, 100))
hg.CreatePhysicCube(scene, hg.Vec3(30, 1, 30), hg.TranslationMat4(hg.Vec3(0, -0.5, 0)), mdl_ref, [mat_ground], 0)
mdl_ref = res.AddModel('wall', hg.CreateCubeModel(vtx_layout, 1, 11, 32))
hg.CreatePhysicCube(scene, hg.Vec3(1, 11, 32), hg.TranslationMat4(hg.Vec3(-15.5, -0.5, 0)), mdl_ref, [mat_walls], 0)
hg.CreatePhysicCube(scene, hg.Vec3(1, 11, 32), hg.TranslationMat4(hg.Vec3(15.5, -0.5, 0)), mdl_ref, [mat_walls], 0)
mdl_ref = res.AddModel('wall2', hg.CreateCubeModel(vtx_layout, 32, 11, 1))
hg.CreatePhysicCube(scene, hg.Vec3(32, 11, 1), hg.TranslationMat4(hg.Vec3(0, -0.5, -15.5)), mdl_ref, [mat_walls], 0)
hg.CreatePhysicCube(scene, hg.Vec3(32, 11, 1), hg.TranslationMat4(hg.Vec3(0, -0.5, 15.5)), mdl_ref, [mat_walls], 0)
clocks = hg.SceneClocks()
# setup physics
physics = hg.SceneBullet3Physics()
physics.SceneCreatePhysicsFromAssets(scene)
physic_nodes = [] # keep track of dynamically created physic nodes
# text rendering
font = hg.LoadFontFromAssets('font/default.ttf', 32)
font_program = hg.LoadProgramFromAssets('core/shader/font.vsb', 'core/shader/font.fsb')
text_uniform_values = [hg.MakeUniformSetValue('u_color', hg.Vec4(1, 1, 0.5))]
text_render_state = hg.ComputeRenderState(hg.BM_Alpha, hg.DT_Always, hg.FC_Disabled)
# main loop
while hg.IsWindowOpen(win):
state = hg.ReadKeyboard()
if state.Key(hg.K_S):
for i in range(1, 8):
hg.SetMaterialValue(mat_objects, 'uDiffuseColor', hg.RandomVec4(0, 1))
if hg.FRand() > 0.5:
node = hg.CreatePhysicCube(scene, hg.Vec3.One, hg.TranslationMat4(hg.RandomVec3(hg.Vec3(-10, 18, -10), hg.Vec3(10, 18, 10))), cube_ref, [mat_objects], 1)
else:
node = hg.CreatePhysicSphere(scene, 0.5, hg.TranslationMat4(hg.RandomVec3(hg.Vec3(-10, 18, -10), hg.Vec3(10, 18, 10))), sphere_ref, [mat_objects], 1)
physics.NodeCreatePhysicsFromAssets(node) # update physics state
physic_nodes.append(node)
elif state.Key(hg.K_D):
if len(physic_nodes):
for i in range(1, 8):
node = physic_nodes[0]
if node:
scene.DestroyNode(node)
physic_nodes.pop(0)
hg.SceneGarbageCollectSystems(scene, physics)
elif state.Key(hg.K_Escape):
break
# update scene and physic system, synchronize physics to scene, submit scene to draw
dt = hg.TickClock()
hg.SceneUpdateSystems(scene, clocks, dt, physics, hg.time_from_sec_f(1 / 60), 4)
view_id, pass_id = hg.SubmitSceneToPipeline(0, scene, hg.IntRect(0, 0, res_x, res_y), True, pipeline, res)
# on-screen usage text
hg.SetView2D(view_id, 0, 0, res_x, res_y, -1, 1, hg.CF_Depth, hg.Color.Black, 1, 0)
hg.DrawText(view_id, font, 'S: Add object - D: Destruct object', font_program, 'u_tex', 0, hg.Mat4.Identity, hg.Vec3(460, res_y - 60, 0), hg.DTHA_Left, hg.DTVA_Bottom, text_uniform_values, [], text_render_state)
hg.DrawText(view_id, font, '%d Object' % len(physic_nodes), font_program, 'u_tex', 0, hg.Mat4.Identity, hg.Vec3(res_x - 200, res_y - 60, 0), hg.DTHA_Left, hg.DTVA_Bottom, text_uniform_values, [], text_render_state)
hg.Frame()
hg.UpdateWindow(win)
hg.RenderShutdown()
hg.DestroyWindow(win)
hg.WindowSystemShutdown()
hg.InputShutdown()