63 lines
2.3 KiB
Python
63 lines
2.3 KiB
Python
# Copyright (C) 2022 RozK
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Affero General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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from engine import (
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vec3, vec3_mul_vec3,
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mat3, mat3_rotation, mat3_mul_vec3,
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mat4, mat4_projection, mat4_lookat,
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resolve_input, set_input_mat4)
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_m2km = vec3(0.001, 0.001, 0.001)
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class _Inputs:
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__slots__ = 'projection', 'view'
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def __init__(self, shader, projection, view):
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self.projection = resolve_input(shader, projection)
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self.view = resolve_input(shader, view)
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class Camera:
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__slots__ = 'origin', 'lookat', 'rotation', 'projection', 'view'
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def __init__(self):
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self.origin = vec3()
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self.lookat = vec3()
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self.rotation = mat3()
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self.projection = mat4()
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self.view = mat4()
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def set_projection(self, half_fov, ratio, near_z, far_z):
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mat4_projection(self.projection, half_fov, ratio, near_z, far_z)
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def set_view(self, origin, lookat, axis, angle):
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self.origin.set(*origin)
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self.lookat.set(*lookat)
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mat3_rotation(self.rotation, axis, angle)
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mat3_mul_vec3(self.origin, self.rotation, self.origin)
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mat3_mul_vec3(self.lookat, self.rotation, self.lookat)
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mat4_lookat(self.view, self.origin, self.lookat)
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def to_km(self):
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vec3_mul_vec3(self.origin, _m2km, self.origin)
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vec3_mul_vec3(self.lookat, _m2km, self.lookat)
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mat4_lookat(self.view, self.origin, self.lookat)
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def resolve_inputs(self, shader, projection = b'u_projection', view = b'u_view'):
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return _Inputs(shader, projection, view)
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def update_inputs(self, inputs):
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set_input_mat4(inputs.projection, self.projection)
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set_input_mat4(inputs.view, self.view)
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