32 lines
980 B
Plaintext
32 lines
980 B
Plaintext
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void setFlareBillboard(
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inout mat4 _MODELVIEW_MATRIX, inout mat3 _MODELVIEW_NORMAL_MATRIX,
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mat4 _VIEW_MATRIX, mat4 _MAIN_CAM_INV_VIEW_MATRIX, mat4 _MODEL_MATRIX,
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vec3 scale, vec2 _screenOffsetScale
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)
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{
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_MODELVIEW_MATRIX = _VIEW_MATRIX * mat4(
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_MAIN_CAM_INV_VIEW_MATRIX[ 0 ],
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_MAIN_CAM_INV_VIEW_MATRIX[ 1 ],
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_MAIN_CAM_INV_VIEW_MATRIX[ 2 ],
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_MODEL_MATRIX[ 3 ]
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);
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vec3 viewPosition = _MODELVIEW_MATRIX[ 3 ].xyz;
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viewPosition.xy += viewPosition.xy * _screenOffsetScale;
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_MODELVIEW_MATRIX[ 3 ].xyz = viewPosition;
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float scaleX = length( _MODEL_MATRIX[ 0 ].xyz ) * scale.x;
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float scaleY = length( _MODEL_MATRIX[ 1 ].xyz ) * scale.y;
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float scaleZ = length( _MODEL_MATRIX[ 2 ].xyz ) * scale.z;
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_MODELVIEW_MATRIX = _MODELVIEW_MATRIX * mat4(
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vec4( scaleX, 0.0, 0.0, 0.0 ),
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vec4( 0.0, scaleY, 0.0, 0.0 ),
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vec4( 0.0, 0.0, scaleZ, 0.0 ),
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vec4( 0.0, 0.0, 0.0, 1.0 )
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);
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_MODELVIEW_NORMAL_MATRIX = mat3( _MODELVIEW_MATRIX);
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}
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