Directx 顶点颜色不会在ID3DXLine的上下文中插值
我创建了一个标准的Win32 DirectX9窗口,并使用自定义效果对其进行渲染,但是我遇到了一个问题,即结果中没有插值顶点的颜色Directx 顶点颜色不会在ID3DXLine的上下文中插值,directx,hlsl,Directx,Hlsl,我创建了一个标准的Win32 DirectX9窗口,并使用自定义效果对其进行渲染,但是我遇到了一个问题,即结果中没有插值顶点的颜色 void CRender::Begin() { perf.begin(); // Capture device state so it can be restored later. // We use ID3DXLine::Begin() to fix some bugs that I don't know how to fix.
void CRender::Begin()
{
perf.begin();
// Capture device state so it can be restored later.
// We use ID3DXLine::Begin() to fix some bugs that I don't know how to fix.
mpLine->Begin();
// Setup shader
shader.Begin( static_cast<float>(FloatTime()) );
}
void CRender::End()
{
// Reverse order of Begin()
shader.End();
mpLine->End();
}
影响来源:
// Vertex shader input
struct VSIN
{
float2 coord : POSITION;
float4 color : COLOR0;
float2 tex : TEXCOORD0;
};
// Vertex shader output / Pixel shader input
struct VSOUT
{
float4 coord : POSITION;
float4 color : COLOR0;
float2 tex : TEXCOORD0;
float2 pos : TEXCOORD1;
};
uniform float2 screen;
uniform float2x4 project;
float4 vstransform( float2 coord, const float2 shift )
{
float2 final = ( mul( project, float4(coord.x,coord.y,1,1) ) + shift ) * 2 / screen;
return float4( final.x-1, 1-final.y, 0, 1 );
}
VSOUT vsfix( VSIN data )
{
VSOUT vert;
const float2 shift = { -0.5f, -0.5f };
vert.coord = vstransform( data.coord, shift );
vert.color = data.color;
vert.tex = data.tex;
vert.pos = vert.coord.xy;
return vert;
}
float4 diffuse( VSOUT vert ) : COLOR
{
float4 px = vert.color;
return px;
}
technique Diffuse
{
pass p0
{
PixelShader = compile ps_2_0 diffuse();
VertexShader = compile vs_2_0 vsfix();
}
}
问题是什么?啊,我的错。这里的问题是,在调用ID3DXLine::Begin()时,为什么不在顶点之间插值颜色,如中所示。对我来说,这意味着ID3DXLine::Begin()会调整设备状态(正如我所期望的那样),但出乎意料的是,颜色插值会停止工作。
// Vertex shader input
struct VSIN
{
float2 coord : POSITION;
float4 color : COLOR0;
float2 tex : TEXCOORD0;
};
// Vertex shader output / Pixel shader input
struct VSOUT
{
float4 coord : POSITION;
float4 color : COLOR0;
float2 tex : TEXCOORD0;
float2 pos : TEXCOORD1;
};
uniform float2 screen;
uniform float2x4 project;
float4 vstransform( float2 coord, const float2 shift )
{
float2 final = ( mul( project, float4(coord.x,coord.y,1,1) ) + shift ) * 2 / screen;
return float4( final.x-1, 1-final.y, 0, 1 );
}
VSOUT vsfix( VSIN data )
{
VSOUT vert;
const float2 shift = { -0.5f, -0.5f };
vert.coord = vstransform( data.coord, shift );
vert.color = data.color;
vert.tex = data.tex;
vert.pos = vert.coord.xy;
return vert;
}
float4 diffuse( VSOUT vert ) : COLOR
{
float4 px = vert.color;
return px;
}
technique Diffuse
{
pass p0
{
PixelShader = compile ps_2_0 diffuse();
VertexShader = compile vs_2_0 vsfix();
}
}