From 14d6a012928443ba8699f1a2834800193bb70c1f Mon Sep 17 00:00:00 2001 From: fickleheart Date: Sun, 22 Mar 2020 12:20:26 -0500 Subject: [PATCH] Distort far edges to viewz for a flat horizon line --- src/hardware/hw_main.c | 22 +++++++++++++--------- 1 file changed, 13 insertions(+), 9 deletions(-) diff --git a/src/hardware/hw_main.c b/src/hardware/hw_main.c index a3a1ba692..253deb282 100644 --- a/src/hardware/hw_main.c +++ b/src/hardware/hw_main.c @@ -709,9 +709,10 @@ static void HWR_RenderPlane(subsector_t *subsector, extrasubsector_t *xsub, bool if (subsector) { // Horizon lines - FOutVector horizonpts[5]; + FOutVector horizonpts[6]; float dist, vx, vy; - const float renderdist = 60000.0f; // Well past the Z cutoff plane, but needed to fill out to that point at a wider angle + const float renderdist = 30000.0f; // How far out to properly render the plane + const float farrenderdist = 32768.0f; // From here, raise plane to horizon level to fill in the line with some texture distortion seg_t *line = &segs[subsector->firstline]; @@ -742,16 +743,19 @@ static void HWR_RenderPlane(subsector_t *subsector, extrasubsector_t *xsub, bool vy = (vy - gr_viewy) * renderdist / dist + gr_viewy; SETUP3DVERT((&horizonpts[3]), vx, vy); - // Midpoint for better filling - vx = (horizonpts[0].x + horizonpts[3].x)/2; - vy = (horizonpts[0].z + horizonpts[3].z)/2; - dist = sqrtf(powf(vx - gr_viewx, 2) + powf(vy - gr_viewy, 2)); - vx = (vx - gr_viewx) * renderdist / dist + gr_viewx; - vy = (vy - gr_viewy) * renderdist / dist + gr_viewy; + // Horizon fills + vx = (horizonpts[0].x - gr_viewx) * farrenderdist / renderdist + gr_viewx; + vy = (horizonpts[0].z - gr_viewy) * farrenderdist / renderdist + gr_viewy; + SETUP3DVERT((&horizonpts[5]), vx, vy); + horizonpts[5].y = gr_viewz; + + vx = (horizonpts[3].x - gr_viewx) * farrenderdist / renderdist + gr_viewx; + vy = (horizonpts[3].z - gr_viewy) * farrenderdist / renderdist + gr_viewy; SETUP3DVERT((&horizonpts[4]), vx, vy); + horizonpts[4].y = gr_viewz; // Draw - HWD.pfnDrawPolygon(&Surf, horizonpts, 5, PolyFlags); + HWD.pfnDrawPolygon(&Surf, horizonpts, 6, PolyFlags); } } }