def SetupVisibleTerrain(self):
self.terrain_node = ShaderTerrainMesh()
self.terrain_node.heightfield = self.loader.loadTexture(self.PngDEM)
self.terrain_node.target_triangle_width = 100.0
self.terrain_node.generate()
self.terrain = self.render.attach_new_node(self.terrain_node)
self.terrain.set_scale(self.PixelNr * self.MeterScale,
self.PixelNr * self.MeterScale,
self.HeightRange)
terrain_shader = Shader.load(Shader.SL_GLSL, "terrain.vert.glsl",
"terrain.frag.glsl")
self.terrain.set_shader(terrain_shader)
self.terrain.set_shader_input("camera", self.camera)
grass_tex = self.loader.loadTexture(self.TextureImage)
grass_tex.set_anisotropic_degree(16)
self.terrain.set_texture(grass_tex)
self.terrain.setPos(0, 0, self.OffsetHeight)
def __init__(self):
# Load some configuration variables, its important for this to happen
# before the ShowBase is initialized
load_prc_file_data(
"", """
textures-power-2 none
window-title Panda3D Shader Terrain Demo
""")
# Initialize the showbase
ShowBase.__init__(self)
# Increase camera FOV aswell as the far plane
self.camLens.set_fov(90)
self.camLens.set_near_far(0.1, 50000)
# Construct the terrain
self.terrain_node = ShaderTerrainMesh()
# Set a heightfield, the heightfield should be a 16-bit png and
# have a quadratic size of a power of two.
self.terrain_node.heightfield_filename = "heightfield.png"
# Set the target triangle width. For a value of 10.0 for example,
# the terrain will attempt to make every triangle 10 pixels wide on screen.
self.terrain_node.target_triangle_width = 10.0
# Generate the terrain
self.terrain_node.generate()
# Attach the terrain to the main scene and set its scale
self.terrain = self.render.attach_new_node(self.terrain_node)
self.terrain.set_scale(1024, 1024, 100)
self.terrain.set_pos(-512, -512, -70.0)
# Set a shader on the terrain. The ShaderTerrainMesh only works with
# an applied shader. You can use the shaders used here in your own shaders
terrain_shader = Shader.load(Shader.SL_GLSL, "terrain.vert.glsl",
"terrain.frag.glsl")
self.terrain.set_shader(terrain_shader)
self.terrain.set_shader_input("camera", self.camera)
# Set some texture on the terrain
grass_tex = self.loader.loadTexture("textures/grass.png")
grass_tex.set_minfilter(SamplerState.FT_linear_mipmap_linear)
grass_tex.set_anisotropic_degree(16)
self.terrain.set_texture(grass_tex)
# Load some skybox - you can safely ignore this code
skybox = self.loader.loadModel("models/skybox.bam")
skybox.reparent_to(self.render)
skybox.set_scale(20000)
skybox_texture = self.loader.loadTexture("textures/skybox.jpg")
skybox_texture.set_minfilter(SamplerState.FT_linear)
skybox_texture.set_magfilter(SamplerState.FT_linear)
skybox_texture.set_wrap_u(SamplerState.WM_repeat)
skybox_texture.set_wrap_v(SamplerState.WM_mirror)
skybox_texture.set_anisotropic_degree(16)
skybox.set_texture(skybox_texture)
skybox_shader = Shader.load(Shader.SL_GLSL, "skybox.vert.glsl",
"skybox.frag.glsl")
skybox.set_shader(skybox_shader)
def __init__(self):
# Load some configuration variables, its important for this to happen
# before the ShowBase is initialized
load_prc_file_data(
"", """
textures-power-2 none
gl-coordinate-system default
window-title Panda3D ShaderTerrainMesh Demo
# As an optimization, set this to the maximum number of cameras
# or lights that will be rendering the terrain at any given time.
stm-max-views 8
# Further optimize the performance by reducing this to the max
# number of chunks that will be visible at any given time.
stm-max-chunk-count 2048
""")
# Initialize the showbase
ShowBase.__init__(self)
# Increase camera FOV as well as the far plane
self.camLens.set_fov(90)
self.camLens.set_near_far(0.1, 50000)
# Construct the terrain
self.terrain_node = ShaderTerrainMesh()
# Set a heightfield, the heightfield should be a 16-bit png and
# have a quadratic size of a power of two.
heightfield = self.loader.loadTexture("heightfield.png")
heightfield.wrap_u = SamplerState.WM_clamp
heightfield.wrap_v = SamplerState.WM_clamp
self.terrain_node.heightfield = heightfield
# Set the target triangle width. For a value of 10.0 for example,
# the terrain will attempt to make every triangle 10 pixels wide on screen.
self.terrain_node.target_triangle_width = 10.0
# Generate the terrain
self.terrain_node.generate()
# Attach the terrain to the main scene and set its scale. With no scale
# set, the terrain ranges from (0, 0, 0) to (1, 1, 1)
self.terrain = self.render.attach_new_node(self.terrain_node)
self.terrain.set_scale(1024, 1024, 100)
self.terrain.set_pos(-512, -512, -70.0)
# Set a shader on the terrain. The ShaderTerrainMesh only works with
# an applied shader. You can use the shaders used here in your own application
terrain_shader = Shader.load(Shader.SL_GLSL, "terrain.vert.glsl",
"terrain.frag.glsl")
self.terrain.set_shader(terrain_shader)
self.terrain.set_shader_input("camera", self.camera)
# Shortcut to view the wireframe mesh
self.accept("f3", self.toggleWireframe)
# Set some texture on the terrain
grass_tex = self.loader.loadTexture("textures/grass.png")
grass_tex.set_minfilter(SamplerState.FT_linear_mipmap_linear)
grass_tex.set_anisotropic_degree(16)
self.terrain.set_texture(grass_tex)
# Load a skybox - you can safely ignore this code
skybox = self.loader.loadModel("models/skybox.bam")
skybox.reparent_to(self.render)
skybox.set_scale(20000)
skybox_texture = self.loader.loadTexture("textures/skybox.jpg")
skybox_texture.set_minfilter(SamplerState.FT_linear)
skybox_texture.set_magfilter(SamplerState.FT_linear)
skybox_texture.set_wrap_u(SamplerState.WM_repeat)
skybox_texture.set_wrap_v(SamplerState.WM_mirror)
skybox_texture.set_anisotropic_degree(16)
skybox.set_texture(skybox_texture)
skybox_shader = Shader.load(Shader.SL_GLSL, "skybox.vert.glsl",
"skybox.frag.glsl")
skybox.set_shader(skybox_shader)
def setup_terrain(self):
"""
Terrain info
Units are meters, which is preferable when working with Bullet.
"""
self.terrain_scale = LVector3(512, 512, 100)
self.terrain_pos = LVector3(-256, -256, -70)
# sample values for a 4096 x 4096px heightmap.
#self.terrain_scale = LVector3(4096, 4096, 1000)
#self.terrain_pos = LVector3(-2048, -2048, -70)
"""
Diamond_subdivision is an alternating triangulation scheme and may
produce better results.
"""
use_diamond_subdivision = True
"""
Construct the terrain
Without scaling, any ShaderTerrainMesh is 1x1x1 units.
"""
self.terrain_node = ShaderTerrainMesh()
"""
Set a heightfield, the heightfield should be a 16-bit png and
have a quadratic size of a power of two.
"""
heightfield = Texture()
heightfield.read(self.heightfield_fn)
heightfield.set_keep_ram_image(True)
self.terrain_node.heightfield = heightfield
# Display characteristic values of the heightfield texture
#minpoint, maxpoint, avg = LPoint3(), LPoint3(), LPoint3()
#heightfield.calc_min_max(minpoint, maxpoint)
#heightfield.calc_average_point(avg, 0.5, 0.5, 0.5)
#print("avg: {} min: {} max: {}".format(avg.x, minpoint.x, maxpoint.x))
"""
Set the target triangle width. For a value of 10.0 for example,
the ShaderTerrainMesh will attempt to make every triangle 10 pixels
wide on screen.
"""
self.terrain_node.target_triangle_width = 10.0
if use_diamond_subdivision:
"""
This has to be specified before calling .generate()
The default is false.
"""
load_prc_file_data("", "stm-use-hexagonal-layout true")
self.terrain_node.generate()
"""
Attach the terrain to the main scene and set its scale. With no scale
set, the terrain ranges from (0, 0, 0) to (1, 1, 1)
"""
self.terrain = self.render.attach_new_node(self.terrain_node)
self.terrain.set_scale(self.terrain_scale)
self.terrain.set_pos(self.terrain_pos)
"""
Set a vertex and a fragment shader on the terrain. The
ShaderTerrainMesh only works with an applied shader.
"""
terrain_shader = Shader.load(Shader.SL_GLSL,
"samples/shader-terrain/terrain.vert.glsl",
"samples/shader-terrain/terrain.frag.glsl")
self.terrain.set_shader(terrain_shader)
self.terrain.set_shader_input("camera", base.camera)
# Set some texture on the terrain
grass_tex = self.loader.load_texture(
"samples/shader-terrain/textures/grass.png")
grass_tex.set_minfilter(SamplerState.FT_linear_mipmap_linear)
grass_tex.set_anisotropic_degree(16)
self.terrain.set_texture(grass_tex)
"""
Set up the DynamicHeightfield (it's a type of PfmFile). We load the
same heightfield image as with ShaderTerrainMesh.
"""
self.DHF = DynamicHeightfield()
self.DHF.read(self.heightfield_fn)
"""
Set up empty PfmFiles to prepare stuff in that is going to
dynamically modify our terrain.
"""
self.StagingPFM = PfmFile()
self.RotorPFM = PfmFile()
"""
Set up the BulletHeightfieldShape (=collision terrain) and give it
some sensible physical properties.
"""
self.HFS = BulletHeightfieldShape(self.DHF, self.terrain_scale.z,
STM=True)
if use_diamond_subdivision:
self.HFS.set_use_diamond_subdivision(True)
HFS_rigidbody = BulletRigidBodyNode("BulletTerrain")
HFS_rigidbody.set_static(True)
friction = 2.0
HFS_rigidbody.set_anisotropic_friction(
LVector3(friction, friction, friction/1.3))
HFS_rigidbody.set_restitution(0.3)
HFS_rigidbody.add_shape(self.HFS)
self.world.attach(HFS_rigidbody)
HFS_NP = NodePath(HFS_rigidbody)
HFS_NP.reparent_to(self.worldNP)
"""
This aligns the Bullet terrain with the ShaderTerrainMesh rendered
terrain. It will be exact as long as the terrain vertex shader from
the STM sample is used and no additional tessellation shader.
For Bullet (as for other physics engines) the origin of objects is at
the center.
"""
HFS_NP.set_pos(self.terrain_pos + self.terrain_scale/2)
HFS_NP.set_sx(self.terrain_scale.x / heightfield.get_x_size())
HFS_NP.set_sy(self.terrain_scale.y / heightfield.get_y_size())
# Disables Bullet debug rendering for the terrain, because it is slow.
#HFS_NP.node().set_debug_enabled(False)
"""
Finally, link the ShaderTerrainMesh and the BulletHeightfieldShape to
the DynamicHeightfield. From now on changes to the DynamicHeightfield
will propagate to the (visible) ShaderTerrainMesh and the (collidable)
BulletHeightfieldShape.
"""
self.HFS.set_dynamic_heightfield(self.DHF)
self.terrain_node.set_dynamic_heightfield(self.DHF)
