we3d 0.1.1

A Wasm Engine 3d. Test project
Documentation 
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pub const SHADER: &str = r#"
attribute vec3 a_position;

attribute vec3 a_normal;
varying vec3 v_normal;

attribute vec2 a_texturecoord;
varying vec2 v_texturecoord;

uniform mat4 u_mvMatrix;
uniform mat4 u_pMatrix;

varying vec3 v_lighting;


mat4 inverse(mat4 m) {
    float
        a00 = m[0][0], a01 = m[0][1], a02 = m[0][2], a03 = m[0][3],
        a10 = m[1][0], a11 = m[1][1], a12 = m[1][2], a13 = m[1][3],
        a20 = m[2][0], a21 = m[2][1], a22 = m[2][2], a23 = m[2][3],
        a30 = m[3][0], a31 = m[3][1], a32 = m[3][2], a33 = m[3][3],
  
        b00 = a00 * a11 - a01 * a10,
        b01 = a00 * a12 - a02 * a10,
        b02 = a00 * a13 - a03 * a10,
        b03 = a01 * a12 - a02 * a11,
        b04 = a01 * a13 - a03 * a11,
        b05 = a02 * a13 - a03 * a12,
        b06 = a20 * a31 - a21 * a30,
        b07 = a20 * a32 - a22 * a30,
        b08 = a20 * a33 - a23 * a30,
        b09 = a21 * a32 - a22 * a31,
        b10 = a21 * a33 - a23 * a31,
        b11 = a22 * a33 - a23 * a32,
  
        det = b00 * b11 - b01 * b10 + b02 * b09 + b03 * b08 - b04 * b07 + b05 * b06;
  
    return mat4(
        a11 * b11 - a12 * b10 + a13 * b09,
        a02 * b10 - a01 * b11 - a03 * b09,
        a31 * b05 - a32 * b04 + a33 * b03,
        a22 * b04 - a21 * b05 - a23 * b03,
        a12 * b08 - a10 * b11 - a13 * b07,
        a00 * b11 - a02 * b08 + a03 * b07,
        a32 * b02 - a30 * b05 - a33 * b01,
        a20 * b05 - a22 * b02 + a23 * b01,
        a10 * b10 - a11 * b08 + a13 * b06,
        a01 * b08 - a00 * b10 - a03 * b06,
        a30 * b04 - a31 * b02 + a33 * b00,
        a21 * b02 - a20 * b04 - a23 * b00,
        a11 * b07 - a10 * b09 - a12 * b06,
        a00 * b09 - a01 * b07 + a02 * b06,
        a31 * b01 - a30 * b03 - a32 * b00,
        a20 * b03 - a21 * b01 + a22 * b00) / det;
  }

mat4 transpose(mat4 inMatrix) {
    vec4 i0 = inMatrix[0];
    vec4 i1 = inMatrix[1];
    vec4 i2 = inMatrix[2];
    vec4 i3 = inMatrix[3];

    mat4 outMatrix = mat4(
                 vec4(i0.x, i1.x, i2.x, i3.x),
                 vec4(i0.y, i1.y, i2.y, i3.y),
                 vec4(i0.z, i1.z, i2.z, i3.z),
                 vec4(i0.w, i1.w, i2.w, i3.w)
                 );

    return outMatrix;
}



void main() {
    vec4 pos = vec4(a_position, 1.0);
    gl_Position = u_pMatrix * u_mvMatrix * pos;
    v_texturecoord = a_texturecoord;
    mat4 uNormalMatrix = transpose(inverse(u_mvMatrix));
    vec3 ambientLight = vec3(0.3, 0.3, 0.3);
    vec3 directionalLightColor = vec3(1, 1, 1);
    vec3 directionalVector = normalize(vec3(0.85, 0.8, 0.75));
    vec4 transformedNormal = uNormalMatrix * vec4(a_normal, 1.0);
    float directional = max(dot(transformedNormal.xyz, directionalVector), 0.0);
    v_lighting = ambientLight + (directionalLightColor * directional);
}"#;

/*
attribute vec2 a_texturecoord;
attribute vec4 a_weights;
attribute vec4 a_indices;
uniform bool u_skin;
uniform mat4 u_mvMatrix;
uniform mat4 u_pMatrix;
varying vec2 v_texturecoord;
uniform mat4 u_bones[24];


mat4 boneTransform() {
  mat4 ret;
  float normfac = 1.0 / (a_weights[0] + a_weights[1] + a_weights[2] + a_weights[3]);
  ret = normfac * a_weights[0] * u_bones[int(a_indices[0])]
      + normfac * a_weights[1] * u_bones[int(a_indices[1])]
      + normfac * a_weights[2] * u_bones[int(a_indices[2])]
      + normfac * a_weights[3] * u_bones[int(a_indices[3])];
  return ret;
}

void main() {
   mat4 bt = u_skin ?
            boneTransform() :
             mat4(
                 1., 0., 0., 0.,
                 0., 1., 0., 0.,
                 0., 0., 1., 0.,
                 0., 0., 0., 1.
             );

    vec4 pos = vec4(a_position, 1.0);
    gl_Position = u_pMatrix * u_mvMatrix * bt * pos;
    v_texturecoord = a_texturecoord;
}*/