max

Calculates the maximum of the sources.

max dest, src0, src1

Registers

dest

Destination register.

src0

Input source register.

src1

Input source register.

To learn more about registers, see Registers.

Remarks

The following code fragment shows the operations performed.

dest.x=(src0.x >= src1.x) ? src0.x : src1.x;
dest.y=(src0.y >= src1.y) ? src0.y : src1.y;
dest.z=(src0.z >= src1.z) ? src0.z : src1.z;
dest.w=(src0.w >= src1.w) ? src0.w : src1.w;

Example

This example compares two registers to find the maximum component values.

vs.1.0
m4x4 oPos, v0, c0	; transform vertices by view/projection matrix

mov r0, c4  		; load green
mov r1, c5	    	; load pink
max r2, r0, r1		; pick max color values
mov oD0, r2		; output

// The resultant vertex color is part green and part pink and is shown below.

// Additional code is used to initialize the constant registers. 


D3DXMATRIX mat, matView, matProj;
D3DXMatrixMultiply(&mat, &matView, &matProj);
D3DXMatrixTranspose(&mat, &mat);
// set C0 with the view and projection matrix
m_pd3dDevice->SetVertexShaderConstant(0, &mat, 4);

// set register c4
float colorGreen[4] = {0, 1, 0, 0};
m_pd3dDevice->SetVertexShaderConstant(4, &colorGreen, 1);

// set register c5
float colorPink[] = {0.75, 0, 0, 0};
m_pd3dDevice->SetVertexShaderConstant(5, &colorPink, 1);

// The c0 register is loaded with the view and projection matrix 
// using the m4x4 instruction (the m4x4 instruction also uses the 
// c1, c2 and c3 registers). The last two methods set the constant 
// color registers.