diff options
Diffstat (limited to 'scene/resources/material.cpp')
| -rw-r--r-- | scene/resources/material.cpp | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/scene/resources/material.cpp b/scene/resources/material.cpp index b0d77751af..49ac1464c2 100644 --- a/scene/resources/material.cpp +++ b/scene/resources/material.cpp @@ -991,7 +991,8 @@ void BaseMaterial3D::_update_shader() { case BILLBOARD_DISABLED: { } break; case BILLBOARD_ENABLED: { - code += " MODELVIEW_MATRIX = VIEW_MATRIX * mat4(INV_VIEW_MATRIX[0], INV_VIEW_MATRIX[1], INV_VIEW_MATRIX[2], MODEL_MATRIX[3]);\n"; + // MAIN_CAM_INV_VIEW_MATRIX is inverse of the camera, even on shadow passes: this ensures the billboard faces the camera when casting shadows. + code += " MODELVIEW_MATRIX = VIEW_MATRIX * mat4(MAIN_CAM_INV_VIEW_MATRIX[0], MAIN_CAM_INV_VIEW_MATRIX[1], MAIN_CAM_INV_VIEW_MATRIX[2], MODEL_MATRIX[3]);\n"; if (flags[FLAG_BILLBOARD_KEEP_SCALE]) { code += " MODELVIEW_MATRIX = MODELVIEW_MATRIX * mat4(vec4(length(MODEL_MATRIX[0].xyz), 0.0, 0.0, 0.0), vec4(0.0, length(MODEL_MATRIX[1].xyz), 0.0, 0.0), vec4(0.0, 0.0, length(MODEL_MATRIX[2].xyz), 0.0), vec4(0.0, 0.0, 0.0, 1.0));\n"; @@ -999,10 +1000,11 @@ void BaseMaterial3D::_update_shader() { code += " MODELVIEW_NORMAL_MATRIX = mat3(MODELVIEW_MATRIX);\n"; } break; case BILLBOARD_FIXED_Y: { - code += " MODELVIEW_MATRIX = VIEW_MATRIX * mat4(vec4(normalize(cross(vec3(0.0, 1.0, 0.0), INV_VIEW_MATRIX[2].xyz)), 0.0), vec4(0.0, 1.0, 0.0, 0.0), vec4(normalize(cross(INV_VIEW_MATRIX[0].xyz, vec3(0.0, 1.0, 0.0))), 0.0), MODEL_MATRIX[3]);\n"; + // MAIN_CAM_INV_VIEW_MATRIX is inverse of the camera, even on shadow passes: this ensures the billboard faces the camera when casting shadows. + code += " MODELVIEW_MATRIX = VIEW_MATRIX * mat4(vec4(normalize(cross(vec3(0.0, 1.0, 0.0), MAIN_CAM_INV_VIEW_MATRIX[2].xyz)), 0.0), vec4(0.0, 1.0, 0.0, 0.0), vec4(normalize(cross(MAIN_CAM_INV_VIEW_MATRIX[0].xyz, vec3(0.0, 1.0, 0.0))), 0.0), MODEL_MATRIX[3]);\n"; if (flags[FLAG_BILLBOARD_KEEP_SCALE]) { - code += " MODELVIEW_MATRIX = MODELVIEW_MATRIX * mat4(vec4(length(MODEL_MATRIX[0].xyz), 0.0, 0.0, 0.0),vec4(0.0, length(MODEL_MATRIX[1].xyz), 0.0, 0.0), vec4(0.0, 0.0, length(MODEL_MATRIX[2].xyz), 0.0), vec4(0.0, 0.0, 0.0, 1.0));\n"; + code += " MODELVIEW_MATRIX = MODELVIEW_MATRIX * mat4(vec4(length(MODEL_MATRIX[0].xyz), 0.0, 0.0, 0.0), vec4(0.0, length(MODEL_MATRIX[1].xyz), 0.0, 0.0), vec4(0.0, 0.0, length(MODEL_MATRIX[2].xyz), 0.0), vec4(0.0, 0.0, 0.0, 1.0));\n"; } code += " MODELVIEW_NORMAL_MATRIX = mat3(MODELVIEW_MATRIX);\n"; } break; |