Exemplo n.º 1
0
    private void BindShader([MaybeNull] WorldCamera camera,
                            RenderingDevice device,
                            IList <Light3d> lights,
                            MdfRenderOverrides overrides)
    {
        // Fill out the globals for the shader
        var globals = new MdfGlobalConstants();

        Matrix4x4 viewProj;

        if (overrides != null && overrides.uiProjection)
        {
            viewProj = device.UiProjection;
        }
        else
        {
            viewProj = camera?.GetViewProj() ?? device.UiProjection;
        }

        // Should we use a separate world matrix?
        if (overrides != null && overrides.useWorldMatrix)
        {
            // Build a world * view * proj matrix
            var worldViewProj = overrides.worldMatrix * viewProj;
            globals.viewProj = worldViewProj;
        }
        else
        {
            globals.viewProj = viewProj;
        }

        // Set material diffuse color for shader
        Vector4 color;

        // TODO: This is a bug, it should check overrideDiffuse
        if (overrides != null && overrides.overrideColor != default)
        {
            color = overrides.overrideColor.ToRGBA();
        }
        else
        {
            color = new PackedLinearColorA(mSpec.diffuse).ToRGBA();
        }

        globals.matDiffuse = color;
        if (overrides != null && overrides.alpha != 1.0f)
        {
            globals.matDiffuse.W *= overrides.alpha;
        }

        // Set time for UV animation in minutes as a floating point number
        var timeInSec = (float)(device.GetLastFrameStart() - device.GetDeviceCreated()).Seconds;

        globals.uvAnimTime.X = timeInSec / 60.0f;
        // Clamp to [0, 1]
        if (globals.uvAnimTime.X > 1)
        {
            globals.uvAnimTime.X -= MathF.Floor(globals.uvAnimTime.X);
        }

        // Swirl is more complicated due to cos/sin involvement
        // This means speedU is in "full rotations every 60 seconds" . RPM
        var uvRotations = globals.UvRotations;

        for (var i = 0; i < mSpec.samplers.Count; ++i)
        {
            var sampler = mSpec.samplers[i];
            if (sampler.uvType != MdfUvType.Swirl)
            {
                continue;
            }

            ref var uvRot = ref uvRotations[i];
            uvRot.X = MathF.Cos(sampler.speedU * globals.uvAnimTime.X * MathF.PI * 2) * 0.1f;
            uvRot.Y = MathF.Sin(sampler.speedV * globals.uvAnimTime.X * MathF.PI * 2) * 0.1f;
        }