def parse(self, frag: Shader, vert: Shader) -> str:
if self.input_type == "uniform":
frag.add_uniform(f'{self.variable_type} {self.variable_name}',
link=self.variable_name)
vert.add_uniform(f'{self.variable_type} {self.variable_name}',
link=self.variable_name)
if self.variable_type == "sampler2D":
frag.add_uniform('vec2 screenSize', link='_screenSize')
return f'texture({self.variable_name}, gl_FragCoord.xy / screenSize).rgb'
return self.variable_name
else:
if self.input_source == "frag":
frag.add_in(f'{self.variable_type} {self.variable_name}')
return self.variable_name
# Reroute input from vertex shader to fragment shader (input must exist!)
else:
vert.add_out(f'{self.variable_type} out_{self.variable_name}')
frag.add_in(f'{self.variable_type} out_{self.variable_name}')
vert.write(f'out_{self.variable_name} = {self.variable_name};')
return 'out_' + self.variable_name
def finalize(frag: Shader, vert: Shader):
"""Checks the given fragment shader for completeness and adds
variable initializations if required.
TODO: Merge with make_finalize?
"""
if frag.contains('pos') and not frag.contains('vec3 pos'):
frag.write_attrib('vec3 pos = -n;')
if frag.contains('vVec') and not frag.contains('vec3 vVec'):
# For worlds, the camera seems to be always at origin in
# Blender, so we can just use the normals as the incoming vector
frag.write_attrib('vec3 vVec = n;')
for var in ('bposition', 'mposition', 'wposition'):
if (frag.contains(var)
and not frag.contains(f'vec3 {var}')) or vert.contains(var):
frag.add_in(f'vec3 {var}')
vert.add_out(f'vec3 {var}')
vert.write(f'{var} = pos;')
if frag.contains('wtangent') and not frag.contains('vec3 wtangent'):
frag.write_attrib('vec3 wtangent = vec3(0.0);')
if frag.contains('texCoord') and not frag.contains('vec2 texCoord'):
frag.add_in('vec2 texCoord')
vert.add_out('vec2 texCoord')
# World has no UV map
vert.write('texCoord = vec2(1.0, 1.0);')
def parse_surface(world: bpy.types.World, node_surface: bpy.types.Node,
frag: Shader):
wrd = bpy.data.worlds['Arm']
rpdat = arm.utils.get_rp()
solid_mat = rpdat.arm_material_model == 'Solid'
if node_surface.type in ('BACKGROUND', 'EMISSION'):
# Append irradiance define
if rpdat.arm_irradiance and not solid_mat:
wrd.world_defs += '_Irr'
# Extract environment strength
# Todo: follow/parse strength input
world.arm_envtex_strength = node_surface.inputs[1].default_value
# Color
out = cycles.parse_vector_input(node_surface.inputs[0])
frag.write(f'fragColor.rgb = {out};')
if not node_surface.inputs[0].is_linked:
solid_mat = rpdat.arm_material_model == 'Solid'
if rpdat.arm_irradiance and not solid_mat:
world.world_defs += '_Irr'
world.arm_envtex_color = node_surface.inputs[0].default_value
world.arm_envtex_strength = 1.0
else:
log.warn(
f'World node type {node_surface.type} must not be connected to the world output node!'
)
# Invalidate the parser state for subsequent executions
cycles.state = None
def parse(self, frag: Shader, vert: Shader) -> str:
if self.input_type == "uniform":
frag.add_uniform(f'{self.variable_type} {self.variable_name}',
link=self.variable_name)
return self.variable_name
else:
if self.input_source == "frag":
frag.add_in(f'{self.variable_type} {self.variable_name}')
return self.variable_name
# Reroute input from vertex shader to fragment shader (input must exist!)
else:
vert.add_out(f'{self.variable_type} out_{self.variable_name}')
frag.add_in(f'{self.variable_type} out_{self.variable_name}')
vert.write(f'out_{self.variable_name} = {self.variable_name};')
return 'out_' + self.variable_name
def build_node_tree(world: bpy.types.World, frag: Shader, vert: Shader,
con: ShaderContext):
"""Generates the shader code for the given world."""
world_name = arm.utils.safestr(world.name)
world.world_defs = ''
rpdat = arm.utils.get_rp()
wrd = bpy.data.worlds['Arm']
if callback is not None:
callback()
# film_transparent, do not render
if bpy.context.scene is not None and bpy.context.scene.render.film_transparent:
world.world_defs += '_EnvCol'
frag.add_uniform('vec3 backgroundCol', link='_backgroundCol')
frag.write('fragColor.rgb = backgroundCol;')
return
parser_state = ParserState(ParserContext.WORLD, world)
parser_state.con = con
parser_state.curshader = frag
parser_state.frag = frag
parser_state.vert = vert
cycles.state = parser_state
# Traverse world node tree
is_parsed = False
if world.node_tree is not None:
output_node = node_utils.get_node_by_type(world.node_tree,
'OUTPUT_WORLD')
if output_node is not None:
is_parsed = parse_world_output(world, output_node, frag)
# No world nodes/no output node, use background color
if not is_parsed:
solid_mat = rpdat.arm_material_model == 'Solid'
if rpdat.arm_irradiance and not solid_mat:
world.world_defs += '_Irr'
col = world.color
world.arm_envtex_color = [col[0], col[1], col[2], 1.0]
world.arm_envtex_strength = 1.0
world.world_defs += '_EnvCol'
# Clouds enabled
if rpdat.arm_clouds and world.arm_use_clouds:
world.world_defs += '_EnvClouds'
# Also set this flag globally so that the required textures are
# included
wrd.world_defs += '_EnvClouds'
frag_write_clouds(world, frag)
if '_EnvSky' in world.world_defs or '_EnvTex' in world.world_defs or '_EnvImg' in world.world_defs or '_EnvClouds' in world.world_defs:
frag.add_uniform('float envmapStrength', link='_envmapStrength')
# Clear background color
if '_EnvCol' in world.world_defs:
frag.write('fragColor.rgb = backgroundCol;')
elif '_EnvTex' in world.world_defs and '_EnvLDR' in world.world_defs:
frag.write('fragColor.rgb = pow(fragColor.rgb, vec3(2.2));')
if '_EnvClouds' in world.world_defs:
frag.write(
'if (pos.z > 0.0) fragColor.rgb = mix(fragColor.rgb, traceClouds(fragColor.rgb, pos), clamp(pos.z * 5.0, 0, 1));'
)
if '_EnvLDR' in world.world_defs:
frag.write('fragColor.rgb = pow(fragColor.rgb, vec3(1.0 / 2.2));')
# Mark as non-opaque
frag.write('fragColor.a = 0.0;')
finalize(frag, vert)
def build_node_tree(world: bpy.types.World, frag: Shader, vert: Shader,
con: ShaderContext):
"""Generates the shader code for the given world."""
world_name = arm.utils.safestr(world.name)
world.world_defs = ''
rpdat = arm.utils.get_rp()
wrd = bpy.data.worlds['Arm']
if callback is not None:
callback()
# film_transparent, do not render
if bpy.context.scene is not None and bpy.context.scene.render.film_transparent:
world.world_defs += '_EnvCol'
frag.add_uniform('vec3 backgroundCol', link='_backgroundCol')
frag.write('fragColor.rgb = backgroundCol;')
return
parser_state = ParserState(ParserContext.WORLD, world)
parser_state.con = con
parser_state.curshader = frag
parser_state.frag = frag
parser_state.vert = vert
cycles.state = parser_state
# Traverse world node tree
is_parsed = False
if world.node_tree is not None:
output_node = node_utils.get_node_by_type(world.node_tree,
'OUTPUT_WORLD')
if output_node is not None:
is_parsed = parse_world_output(world, output_node, frag)
# No world nodes/no output node, use background color
if not is_parsed:
solid_mat = rpdat.arm_material_model == 'Solid'
if rpdat.arm_irradiance and not solid_mat:
world.world_defs += '_Irr'
col = world.color
world.arm_envtex_color = [col[0], col[1], col[2], 1.0]
world.arm_envtex_strength = 1.0
# Irradiance/Radiance: clear to color if no texture or sky is provided
if rpdat.arm_irradiance or rpdat.arm_irradiance:
if '_EnvSky' not in world.world_defs and '_EnvTex' not in world.world_defs and '_EnvImg' not in world.world_defs:
# Irradiance json file name
world.arm_envtex_name = world_name
world.arm_envtex_irr_name = world_name
write_probes.write_color_irradiance(world_name,
world.arm_envtex_color)
# Clouds enabled
if rpdat.arm_clouds and world.arm_use_clouds:
world.world_defs += '_EnvClouds'
# Also set this flag globally so that the required textures are
# included
wrd.world_defs += '_EnvClouds'
frag_write_clouds(world, frag)
if '_EnvSky' in world.world_defs or '_EnvTex' in world.world_defs or '_EnvImg' in world.world_defs or '_EnvClouds' in world.world_defs:
frag.add_uniform('float envmapStrength', link='_envmapStrength')
# Clear background color
if '_EnvCol' in world.world_defs:
frag.write('fragColor.rgb = backgroundCol;')
elif '_EnvTex' in world.world_defs and '_EnvLDR' in world.world_defs:
frag.write('fragColor.rgb = pow(fragColor.rgb, vec3(2.2));')
if '_EnvClouds' in world.world_defs:
frag.write(
'if (n.z > 0.0) fragColor.rgb = mix(fragColor.rgb, traceClouds(fragColor.rgb, n), clamp(n.z * 5.0, 0, 1));'
)
if '_EnvLDR' in world.world_defs:
frag.write('fragColor.rgb = pow(fragColor.rgb, vec3(1.0 / 2.2));')
# Mark as non-opaque
frag.write('fragColor.a = 0.0;')
# Hack to make procedural textures work
frag_bpos = (
frag.contains('bposition')
and not frag.contains('vec3 bposition')) or vert.contains('bposition')
if frag_bpos:
frag.add_in('vec3 bposition')
vert.add_out('vec3 bposition')
# Use normals for now
vert.write('bposition = nor;')
frag_mpos = (
frag.contains('mposition')
and not frag.contains('vec3 mposition')) or vert.contains('mposition')
if frag_mpos:
frag.add_in('vec3 mposition')
vert.add_out('vec3 mposition')
# Use normals for now
vert.write('mposition = nor;')
if frag.contains('texCoord') and not frag.contains('vec2 texCoord'):
frag.add_in('vec2 texCoord')
vert.add_out('vec2 texCoord')
# World has no UV map
vert.write('texCoord = vec2(1.0, 1.0);')
def parse(self, vertshdr:Shader,part_con) -> str:
if(self.sclX or self.sclY or self.sclZ):
scl = parse_vector_input(self.inputs[2])
if(self.sclX):
vertshdr.write(f'spos.x *= {scl}.x;')
if(self.sclY):
vertshdr.write(f'spos.y *= {scl}.y;')
if(self.sclX):
vertshdr.write(f'spos.z *= {scl}.z;')
if(self.billBoard):
vertshdr.add_uniform('mat4 WV', '_worldViewMatrix')
vertshdr.write('spos = mat4(transpose(mat3(WV))) * spos;')
if(self.rotX or self.rotY or self.rotZ):
rot = parse_vector_input(self.inputs[1])
if(self.rotX and not self.rotY and not self.rotZ):
vertshdr.write(f'mat3 part_rot_mat = mat3(1.0, 0.0, 0.0,')
vertshdr.write(f' 0.0, cos({rot}.x), sin({rot}.x),')
vertshdr.write(f' 0.0, -sin({rot}.x), cos({rot}.x));')
if(not self.rotX and self.rotY and not self.rotZ):
vertshdr.write(f'mat3 part_rot_mat = mat3(cos({rot}.y), 0.0, -sin({rot}.y),')
vertshdr.write(f' 0.0, 1.0, 0.0,')
vertshdr.write(f' sin({rot}.y), 0.0, cos({rot}.y));')
if(not self.rotX and not self.rotY and self.rotZ):
vertshdr.write(f'mat3 part_rot_mat = mat3(cos({rot}.z), sin({rot}.z), 0.0,')
vertshdr.write(f' -sin({rot}.z), cos({rot}.z), 0.0,')
vertshdr.write(f' 0.0, 0.0, 1.0);')
if(self.rotX and self.rotY and not self.rotZ):
vertshdr.write(f'mat3 part_rot_mat = mat3(cos({rot}.y), 0.0, -sin({rot}.y),')
vertshdr.write(f' sin({rot}.y) * sin({rot}.x), cos({rot}.x), cos({rot}.y) * sin({rot}.x),')
vertshdr.write(f' sin({rot}.y) * cos({rot}.x), -sin({rot}.x), cos({rot}.y) * cos({rot}.x));')
if(self.rotX and not self.rotY and self.rotZ):
vertshdr.write(f'mat3 part_rot_mat = mat3(cos({rot}.z), sin({rot}.z), 0.0,')
vertshdr.write(f' -sin({rot}.z) * cos({rot}.x), cos({rot}.z) * cos({rot}.x), sin({rot}.x),')
vertshdr.write(f' sin({rot}.z) * sin({rot}.x), -cos({rot}.z) * sin({rot}.x), cos({rot}.x));')
if(not self.rotX and self.rotY and self.rotZ):
vertshdr.write(f'mat3 part_rot_mat = mat3(cos({rot}.z) * cos({rot}.y), sin({rot}.z) * cos({rot}.y), -sin({rot}.y),')
vertshdr.write(f' -sin({rot}.z) , cos({rot}.z), 0.0,')
vertshdr.write(f' cos({rot}.z) * sin({rot}.y), sin({rot}.z) * sin({rot}.y), cos({rot}.y));')
if(self.rotX and self.rotY and self.rotZ):
vertshdr.write(f'mat3 part_rot_mat = mat3(cos({rot}.z) * cos({rot}.y), sin({rot}.z) * cos({rot}.y), -sin({rot}.y),')
vertshdr.write(f' -sin({rot}.z) * cos({rot}.x) + cos({rot}.z) * sin({rot}.y) * sin({rot}.x), cos({rot}.z) * cos({rot}.x) + sin({rot}.z) * sin({rot}.y) * sin({rot}.x), cos({rot}.y) * sin({rot}.x),')
vertshdr.write(f' sin({rot}.z) * sin({rot}.x) + cos({rot}.z) * sin({rot}.y) * cos({rot}.x), -cos({rot}.z) * sin({rot}.x) + sin({rot}.z) * sin({rot}.y) * cos({rot}.x), cos({rot}.y) * cos({rot}.x));')
if(self.rotX or self.rotY or self.rotZ):
vertshdr.write('spos.xyz = part_rot_mat * spos.xyz;')
if((part_con.data['name'] == 'mesh' or 'translucent') and vertshdr.contains('wnormal')):
vertshdr.write('wnormal = transpose(inverse(part_rot_mat)) * wnormal;')
if(self.posX or self.posY or self.posZ):
pos = parse_vector_input(self.inputs[0])
if(self.posX):
vertshdr.write(f'spos.x += {pos}.x;')
if(self.posY):
vertshdr.write(f'spos.y += {pos}.y;')
if(self.posZ):
vertshdr.write(f'spos.z += {pos}.z;')
if(vertshdr.contains('vec3 disp')):
vertshdr.write('wposition = vec4(W * spos).xyz;')
def frag_write_main(world: bpy.types.World, frag: Shader):
if '_EnvSky' in world.world_defs or '_EnvTex' in world.world_defs or '_EnvClouds' in world.world_defs:
frag.write('vec3 n = normalize(normal);')
if '_EnvCol' in world.world_defs:
frag.write('fragColor.rgb = backgroundCol;')
if '_EnvTransp' in world.world_defs:
frag.write('return;')
# Static background image
elif '_EnvImg' in world.world_defs:
# Will have to get rid of gl_FragCoord, pass texture coords from
# vertex shader
frag.write('vec2 texco = gl_FragCoord.xy / screenSize;')
frag.write(
'fragColor.rgb = texture(envmap, vec2(texco.x, 1.0 - texco.y)).rgb * envmapStrength;'
)
# Environment texture
# Also check for _EnvSky to prevent case when sky radiance is enabled
elif '_EnvTex' in world.world_defs and '_EnvSky' not in world.world_defs:
frag.write(
'fragColor.rgb = texture(envmap, envMapEquirect(n)).rgb * envmapStrength;'
)
if '_EnvLDR' in world.world_defs:
frag.write('fragColor.rgb = pow(fragColor.rgb, vec3(2.2));')
if '_EnvSky' in world.world_defs:
frag.write('float cos_theta = clamp(n.z, 0.0, 1.0);')
frag.write('float cos_gamma = dot(n, hosekSunDirection);')
frag.write('float gamma_val = acos(cos_gamma);')
frag.write(
'fragColor.rgb = Z * hosekWilkie(cos_theta, gamma_val, cos_gamma) * envmapStrength;'
)
if '_EnvClouds' in world.world_defs:
frag.write(
'if (n.z > 0.0) fragColor.rgb = mix(fragColor.rgb, traceClouds(fragColor.rgb, n), clamp(n.z * 5.0, 0, 1));'
)
if '_EnvLDR' in world.world_defs:
frag.write('fragColor.rgb = pow(fragColor.rgb, vec3(1.0 / 2.2));')
# Mark as non-opaque
frag.write('fragColor.a = 0.0;')
