keyframelinear.nvv

来自「游戏编程精华02－含有几十个游戏编程例子」· NVV 代码 · 共 34 行

#include "Constants.h"

;
; v0,v3 position for keyframe 0, 1
; v1,v4 normal for keyframe 0, 1
; v2,v5 tex coord for keyframe 0, 1
;

vs.1.0

;lerp in model space
mul r1, v0, c[CV_BLEND_FACTORS].y
mad r1, v3, c[CV_BLEND_FACTORS].x, r1

; and the same for the normals
mul r2, v1, c[CV_BLEND_FACTORS].y
mad r2, v4, c[CV_BLEND_FACTORS].x, r2

; Transform to clip space
dp4 oPos.x, r1, c[CV_WORLDVIEWPROJ_0]
dp4 oPos.y, r1, c[CV_WORLDVIEWPROJ_1]
dp4 oPos.z, r1, c[CV_WORLDVIEWPROJ_2]
dp4 oPos.w, r1, c[CV_WORLDVIEWPROJ_3]

dp3 r0.x, r2, c[CV_WORLD_0]
dp3 r0.y, r2, c[CV_WORLD_1]
dp3 r0.z, r2, c[CV_WORLD_2]

; Dot normal with light direction in world space
dp3 oD0, r0, c[CV_LIGHT_DIRECTION]

; Pass through texture coords
mov oT0.xy, v2