C ++ Directx 11环境照明

时间:2012-08-03 13:51:26

标签: c++ shader hlsl lighting directx-11

我目前在Directx 11中遇到问题,实际上是环境照明。这是代码:

 cbuffer ConstantBuffer
{
    float4x4 final;
    float4x4 rotation;    // the rotation matrix
    float4 lightvec;      // the light's vector
    float4 lightcol;      // the light's color
    float4 ambientcol;    // the ambient light's color
}

struct VOut
{
    float4 color : COLOR;
    float4 position : SV_POSITION;
};

VOut VShader(float4 position : POSITION, float4 normal : NORMAL)
{
    VOut output;

    output.position = mul(final, position);

    // set the ambient light
    output.color = ambientcol;

    // calculate the diffuse light and add it to the ambient light
    float4 norm = normalize(mul(rotation, normal));
    float diffusebrightness = saturate(dot(norm, lightvec));
    output.color += lightcol * diffusebrightness;

    return output;
}

float4 PShader(float4 color : COLOR) : SV_TARGET
{
    return color;
}

然后我将值发送到着色器:

ambLight.LightVector = D3DXVECTOR4(1.0f, 1.0f, 1.0f, 0.0f);
ambLight.LightColor = D3DXCOLOR(0.5f, 0.5f, 0.5f, 1.0f);
ambLight.AmbientColor = D3DXCOLOR(0.2f, 0.2f, 0.2f, 1.0f);

ShaderManager.UpdateSubresourceDiffuseShader(devcon);

然后我得到以下内容: a busy cat http://i49.tinypic.com/2j105fs.png

为什么?

1 个答案:

答案 0 :(得分:0)

我尝试了你的着色器并且似乎有效,所以也许某些变量没有正确传递。

您可以尝试直接将一个变量名称设置为颜色输出:

output.color = lightvec;

output.color = lightcol;

首先,您可以仔细检查值。