crs (Vertex Shader)
Computes a cross product using the right-hand rule.
Syntax
where
- dst is the destination register.
- src0 is a source register.
- src1 is a source register.
Remarks
| Vertex shader versions | 1_1 | 2_0 | 2_x | 2_sw | 3_0 | 3_sw |
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| crs | | x | x | x | x | x |
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This instruction works as shown here.
dest.x = src0.y * src1.z - src0.z * src1.y;
dest.y = src0.z * src1.x - src0.x * src1.z;
dest.z = src0.x * src1.y - src0.y * src1.x;
This is a macro instruction, which takes two instruction slots.
Some restrictions on use:
- src0 cannot be the same register as dest.
- src1 cannot be the same register as dest.
- src0 cannot have any swizzle other than the default swizzle (.xyzw).
- src1 cannot have any swizzle other than the default swizzle (.xyzw).
- dest has to have exactly one of the following seven masks: .x | .y | .z | .xy | .xz | .yz | .xyz.
- dest must be a temporary register.
- dest must not be the same register as src0 or src1
Instruction Information
| Minimum operating system | Windows 98 |
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