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Cleaning up implementation of isometric camera with optional orthographic projection.

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All CVars, mapinfo variables, and playerinfo/playerpawn variables are gone.
A Camera actor named 'SpectatorCamera' is defined in warsrc/static/zscript/actors/shared/camera.zs

The following new flag bits were defined in the 'DViewPosition' struct for use with actor->ViewPos in src/playsim/actor.h:
	VPSF_ALLOWOUTOFBOUNDS =		1 << 3,			// Allow viewpoint to go out of bounds (hardware renderer only).
	VPSF_ORTHOGRAPHIC =		1 << 4,			// Use orthographic projection.
	VPSF_ISOMETRICSPRITES =		1 << 5,			// Displace sprites towards camera and don't billboard (drawn from isometric perspective).

Basically, spawn a SpectatorCamera actor with the appropriate flags and set it to player.camera.
See example template: https://www.mediafire.com/file/fv8rytayjt9l6g1/isometric_actor_wads.zip/file

Has been tested with multiplayer death and disconnection (and respawns). Not tested with portals.
Still only works with hardware renderer (mostly). But should be compatible with older mods and libraries.
This commit is contained in:
Dileep V. Reddy 2024-01-25 21:40:25 -07:00 • committed by Rachael Alexanderson
commit 25f1407228
16 changed files with 80 additions and 148 deletions
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42
src/rendering/hwrenderer/hw_entrypoint.cpp
View file

@ -162,40 +162,14 @@ sector_t* RenderViewpoint(FRenderViewpoint& mainvp, AActor* camera, IntRect* bou
di->Viewpoint.FieldOfView = DAngle::fromDeg(fov); // Set the real FOV for the current scene (it's not necessarily the same as the global setting in r_viewpoint)
// Switch viewpoint for isometric camera
if((r_isocam || (camera->Level->flags3 & LEVEL3_ISOMETRICMODE)) && camera->player != NULL)
{
float camdist = camera->Level->iso_dist;
float isocam_pitch = camera->Level->isocam_pitch;
if (r_isoviewpoint > 0)
{
isocam_pitch = r_iso_pitch;
camdist = r_iso_dist;
camera->player->isoyaw = 45.0 * (r_isoviewpoint - 1); // The eight cardinal directions
}
float inv_iso_dist = 1.0f/camdist; // camdist can change in next line
bool iso_ortho = ((r_isoviewpoint > 0) && r_orthographic) || ((r_isoviewpoint == 0) && camera->Level->flags3 & LEVEL3_ORTHOGRAPHIC);
if (iso_ortho) camdist = r_iso_camdist;
vp.Pos.X -= camdist * DAngle::fromDeg(camera->player->isoyaw).Cos();
vp.Pos.Y -= camdist * DAngle::fromDeg(camera->player->isoyaw).Sin();
vp.Pos.Z += camdist * FAngle::fromDeg(isocam_pitch).Tan() - 0.5 * camera->player->viewheight;
vp.HWAngles.Pitch = FAngle::fromDeg(isocam_pitch);
vp.Angles.Pitch = DAngle::fromDeg(isocam_pitch);
vp.Angles.Yaw = DAngle::fromDeg(camera->player->isoyaw);
vp.Angles.Roll = DAngle::fromDeg(0);
vp.showviewer = true; // Draw player sprite
r_drawplayersprites = false; // Don't draw first-person hands/weapons
// Stereo mode specific perspective projection
if (!iso_ortho) inv_iso_dist = 1.0f;
di->VPUniforms.mProjectionMatrix = eye.GetProjection(fov, ratio, fovratio * inv_iso_dist, iso_ortho);
}
else // Regular first-person viewpoint
{
vp.showviewer = false;
r_drawplayersprites = true; // Restore first-person hands/weapons
// Stereo mode specific perspective projection
di->VPUniforms.mProjectionMatrix = eye.GetProjection(fov, ratio, fovratio, false);
}
if(mainview && (camera->ViewPos != NULL) && (camera->ViewPos->Offset.XY().Length() > 0)) r_drawplayersprites = false;
else r_drawplayersprites = true; // Restore first-person hands/weapons
// Stereo mode specific perspective projection
float inv_iso_dist = 1.0f;
bool iso_ortho = (camera->ViewPos != NULL) && (camera->ViewPos->Flags & VPSF_ORTHOGRAPHIC);
if (iso_ortho && (camera->ViewPos->Offset.XY().Length() > 0)) inv_iso_dist = 3.0f/camera->ViewPos->Offset.XY().Length();
di->VPUniforms.mProjectionMatrix = eye.GetProjection(fov, ratio, fovratio * inv_iso_dist, iso_ortho);
// Stereo mode specific viewpoint adjustment
vp.Pos += eye.GetViewShift(vp.HWAngles.Yaw.Degrees());
di->SetupView(RenderState, vp.Pos.X, vp.Pos.Y, vp.Pos.Z, false, false);