Hello Square Colors: Getting started with O3D, take 2.

// World View Projection matrix that will transform the input vertices
  // to screen space.
  float4x4 worldViewProjection : WorldViewProjection;
 
  // This specifies the color of the triangles.  A Param with the same name will
  // be created on the material using the shader.
  float4 color;
 
  // input parameters for our vertex shader
  struct VertexShaderInput {
    float4 position : POSITION;
  };
 
  // input parameters for our pixel shader
  struct PixelShaderInput {
    float4 position : POSITION;
  };
 
  /**
   * The vertex shader simply transforms the input vertices to screen space.
   */
  PixelShaderInput vertexShaderFunction(VertexShaderInput input) {
    PixelShaderInput output;
 
    // Multiply the vertex positions by the worldViewProjection matrix to
    // transform them to screen space.
    output.position = mul(input.position, worldViewProjection);
    return output;
  }
 
  /**
   * Our pixel shader returns the value of color parameter.
   */
  float4 pixelShaderFunction(PixelShaderInput input): COLOR {
    return color;
  }
 
  // Here we tell our effect file *which* functions are
  // our vertex and pixel shaders.
 
  // #o3d VertexShaderEntryPoint vertexShaderFunction
  // #o3d PixelShaderEntryPoint pixelShaderFunction
  // #o3d MatrixLoadOrder RowMajor

Hello Square: Colors