# LCSC 3D Models

This is part of the easyeda2kicad code.
The whole code depends on pydantic and typing_extensions.
The dependencies didn't even install using pip on Debian 11.6.

This is the portion of the code needed to download the 3D model for an LCSC component code.
The generated WRL has colors, but not correct materials.

This is all related to the issue #380

# Colors

diffuse - specular

## Analyzed

### SOT-23-3P_L2.9-W1.3-H1.0-LS2.4-P0.95.wrl (C181094)
- LCEDA: 1.0 1.0 1.0 - 0.8784313725490196 0.8784313725490196 0.8784313725490196
- Silver pins:0.7686274509803922 0.7686274509803922 0.7686274509803922 - 0.615686274509804 0.615686274509804 0.615686274509804
- Plastic body: 0.25098039215686274 0.25098039215686274 0.25098039215686274 - 0.07450980392156863 0.07450980392156863 0.07450980392156863
- Text legend: 0.45098039215686275 0.43137254901960786 0.4196078431372549 - 0.03137254901960784 0.03137254901960784 0.03137254901960784

### CONN-TH_4P-P2.54_MOLEX_0705430004.wrl (C3020650)

This model is wrong, the pins should be gold

- Silver pins:(also legend) 0.8313725490196079 0.8313725490196079 0.8196078431372549 - 0.6666666666666666 0.6666666666666666 0.6549019607843137
- Plastic body: 0.20784313725490197 0.20784313725490197 0.20784313725490197 - 0.01568627450980392 0.01568627450980392 0.01568627450980392
- Plastic body pin 1 arrow: 0.07058823529411765 0.07058823529411765 0.07058823529411765 - 0.00392156862745098 0.00392156862745098 0.00392156862745098
- Error color used to fill the legend ... should be plastic body, an error: 0.792156862745098 0.8196078431372549 0.9333333333333333 - 0.396078431372549 0.4117647058823529 0.4666666666666667

### HDR2.54-M-LI-1X1P.wrl (C213440)

- Golden pins: 0.9490196078431372 0.7607843137254902 0.1803921568627451 - 0.7607843137254902 0.6078431372549019 0.1450980392156863
- Plastic body: 0.17647058823529413 0.17647058823529413 0.17647058823529413 - 0.050980392156862744 0.050980392156862744 0.050980392156862744
- LCEDA: 0.0 0.0 0.0 - 0.0 0.0 0.0

### SMB_L4.6-W3.6-LS5.3-BI.wrl (C78395)

- Plastic body: 0.25098039215686274 0.25098039215686274 0.25098039215686274 - 0.12549019607843137 0.12549019607843137 0.12549019607843137
- Silver pins: 0.7803921568627451 0.7803921568627451 0.7803921568627451 - 0.38823529411764707 0.38823529411764707 0.38823529411764707
- LCEDA: 1.0 1.0 1.0 - 0.8784313725490196 0.8784313725490196 0.8784313725490196

### SMA_L4.3-W2.6-LS5.2-RD (C8678)

- Plastic body: 0.25098039215686274 0.25098039215686274 0.25098039215686274 - 0.12549019607843137 0.12549019607843137 0.12549019607843137
- Silver pins: 0.7803921568627451 0.7803921568627451 0.7803921568627451 - 0.38823529411764707 0.38823529411764707 0.38823529411764707
- Text legend: 0.6666666666666666 0.6666666666666666 0.6666666666666666 - 0.3333333333333333 0.3333333333333333 0.3333333333333333
- LCEDA 1.0 1.0 1.0 - 0.8784313725490196 0.8784313725490196 0.8784313725490196
- Pin 1 bars 0.8509803921568627 0.8509803921568627 0.8509803921568627 - 0.4235294117647059 0.4235294117647059 0.4235294117647059

### SOT-23-6_L2.9-W1.6-H1.5-LS2.8-P0.95.wrl  (C202311)

- Plastic body: 0.25098039215686274 0.25098039215686274 0.25098039215686274 - 0.07450980392156863 0.07450980392156863 0.07450980392156863
- Text legend: 0.45098039215686275 0.43137254901960786 0.4196078431372549 - 0.03137254901960784 0.03137254901960784 0.03137254901960784
- LCEDA 1.0 1.0 1.0 - 0.8784313725490196 0.8784313725490196 0.8784313725490196
- Silver pins: 0.7686274509803922 0.7686274509803922 0.7686274509803922 - 0.615686274509804 0.615686274509804 0.615686274509804

### SOIC-8_L4.9-W3.9-P1.27-LS6.0-BL-EP3.3-1.wrl  (C2760005)

- Plastic body: 0.20784313725490197 0.20784313725490197 0.20784313725490197 - 0.01568627450980392 0.01568627450980392 0.01568627450980392
- Pin 1 circle: 0.34901960784313724 0.34901960784313724 0.34901960784313724 - 0.023529411764705882 0.023529411764705882 0.023529411764705882
- Silver pins: 0.6666666666666666 0.6666666666666666 0.6666666666666666 - 0.4666666666666667 0.4666666666666667 0.4666666666666667
- LCEDA: 1.0 1.0 1.0 - 0.5019607843137255 0.5019607843137255 0.5019607843137255

### SW-SMD_4P-L5.2-W5.2-H1.5-LS6.4-P3.70  (C318884)

- Metal body 0.8313725490196079 0.8392156862745098 0.8313725490196079 - 0.4980392156862745 0.5019607843137255 0.4980392156862745
- Plastic inner body 0.07058823529411765 0.07058823529411765 0.07058823529411765 - 0.00392156862745098 0.00392156862745098 0.00392156862745098
- Golden button 0.9490196078431372 0.7607843137254902 0.1803921568627451 - 0.7607843137254902 0.6078431372549019 0.1450980392156863
- Plastic body 0.2980392156862745 0.2980392156862745 0.2980392156862745 - 0.09019607843137255 0.09019607843137255 0.09019607843137255
- Silver pins: 0.7686274509803922 0.7686274509803922 0.7686274509803922 - 0.615686274509804 0.615686274509804 0.615686274509804
- LCEDA 1.0 1.0 1.0 - 0.8784313725490196 0.8784313725490196 0.8784313725490196

### SW-TH_SPEF110100   C115366

This model uses d = 1, but isn't transparent

- Metal body and Silver pins 0.9686274509803922 0.9686274509803922 0.9686274509803922 - 0.7529411764705882 0.7529411764705882 0.7529411764705882
- Plastic body 0.25882352941176473 0.25882352941176473 0.25882352941176473 - 0.7529411764705882 0.7529411764705882 0.7529411764705882

## Groups

### Silver Metal

- 0.969 0.969 0.969 - 0.753 0.753 0.753
- 0.831 0.831 0.820 - 0.667 0.667 0.655 (1,56% de error en B)
- 0.780 0.780 0.780 - 0.388 0.388 0.388 (2x)
- 0.769 0.769 0.769 - 0.616 0.616 0.616 (3x)
- 0.667 0.667 0.667 - 0.467 0.467 0.467

### Plastic body

- 0.298 0.298 0.298 - 0.090 0.090 0.090
- 0.259 0.259 0.259 - 0.753 0.753 0.753
- 0.251 0.251 0.251 - 0.125 0.125 0.125 (2x)
- 0.251 0.251 0.251 - 0.075 0.075 0.075 (2x)
- 0.208 0.208 0.208 - 0.016 0.016 0.016 (2x)
- 0.176 0.176 0.176 - 0.051 0.051 0.051

### Golden Metal

- 0.949 0.761 0.180 - 0.761 0.608 0.145 (2x)


# Position

## C181094

This is an analysis of the positions indicated by EasyEDA and KiCad.
Is related to #380, the conclusion was that the 3D model adjust wasn't needed for the footprint once exported to KiCad.

Data from the EasyEDA API:

```
translation=Ee3dModelBase(x='608', y='-320', z='0'),
rotation=Ee3dModelBase(x='0', y='0', z='180'),
```

PAD 1 position according to EasyEDA footprint

```
PAD
 - RECT
 - 4003.937
 - 3003.74
 - 4.9213
 - 2.7559
 - 1
 -
 - 1
 - 0
 - 4001.4764
```

KiCad 3D model offset

```
      (offset (xyz -861.57 843.28 -0))
      (scale (xyz 1 1 1))
      (rotate (xyz 0 0 180))
```

KiCad PAD 1

```
    (pad "1" smd rect locked (at 1 0.95) (size 1.25 0.7) (layers "F.Cu" "F.Paste" "F.Mask")
      (net 2 "GND") (pinfunction "G") (pintype "input") (tstamp 12c57c2f-095b-44d0-b46b-b41b1ec9add0))
```

Some math:

```
4003.937 - 608 = 3395.937*0.254 = 862.57 (1 mm off == x position for KiCad pad 1)
3003.74 - (-320) = 3323.74*0.254 = 844.23 (0.95 mm off == y position for KiCad pad 1)

1 mil = 25.4/1000 = 0.0254

861.57/0.254 = 3392+608 = 4000 (rounded!)
843.28/0.254 = 3320-320 = 3000 (rounded!)

(EE_PAD.x - EE_3D_offset.x) * 25.4/100 - KI_PAD.x = (4003.937-608)*0.254-1 = 861.567998
(EE_PAD.y - EE_3D_offset.y) * 25.4/100 - KI_PAD.y = (3003.74-(-320))*0.254-0.95 = 843.27996

Rotated 180 degrees is x' = -x; y' = y
x=-861.57
y=843.28
z=0
```

The VRML is scaled x/2.54, coordinates are from the PCB, but Y axis is negative.