review ndc to screen projection

Bigfoot71 · Bigfoot71 · commit 363f3afa60ce · 2025-03-13T04:19:12.000+01:00
diff --git a/src/external/rlsw.h b/src/external/rlsw.h
@@ -1010,7 +1010,7 @@ static inline void sw_blend_colors(float dst[4], float src[4])
 static inline void sw_project_ndc_to_screen(float screen[2], const float ndc[4])
 {
     screen[0] = RLSW.vpPos[0] + (ndc[0] + 1.0f) * 0.5f * RLSW.vpDim[0];
-    screen[1] = RLSW.vpPos[1] + (ndc[1] + 1.0f) * 0.5f * RLSW.vpDim[1];
+    screen[1] = RLSW.vpPos[1] + (1.0f - ndc[1]) * 0.5f * RLSW.vpDim[1];
 }
 
 

Original file line number	Diff line number	Diff line change
`@@ -1010,7 +1010,7 @@ static inline void sw_blend_colors(float dst[4], float src[4])`
`1010`	`1010`	`static inline void sw_project_ndc_to_screen(float screen[2], const float ndc[4])`
`1011`	`1011`	`{`
`1012`	`1012`	`screen[0] = RLSW.vpPos[0] + (ndc[0] + 1.0f) * 0.5f * RLSW.vpDim[0];`
`1013`		`- screen[1] = RLSW.vpPos[1] + (ndc[1] + 1.0f) * 0.5f * RLSW.vpDim[1];`
	`1013`	`+ screen[1] = RLSW.vpPos[1] + (1.0f - ndc[1]) * 0.5f * RLSW.vpDim[1];`
`1014`	`1014`	`}`
`1015`	`1015`
`1016`	`1016`