- Implement model rendering in softpoly

src/CMakeLists.txt

@@ -756,6 +756,7 @@ set( POLYRENDER_SOURCES
 	polyrenderer/scene/poly_wall.cpp
 	polyrenderer/scene/poly_wallsprite.cpp
 	polyrenderer/scene/poly_sprite.cpp
+	polyrenderer/scene/poly_model.cpp
 	polyrenderer/scene/poly_sky.cpp
 	polyrenderer/scene/poly_light.cpp
 	polyrenderer/drawers/poly_buffer.cpp

src/polyrenderer/drawers/poly_draw_args.cpp

@@ -130,6 +130,16 @@ void PolyDrawArgs::DrawArray(PolyRenderThread *thread, const TriVertex *vertices
 {
 	mVertices = vertices;
 	mVertexCount = vcount;
+	mElements = nullptr;
+	mDrawMode = mode;
+	thread->DrawQueue->Push<DrawPolyTrianglesCommand>(*this, PolyTriangleDrawer::is_mirror());
+}
+
+void PolyDrawArgs::DrawElements(PolyRenderThread *thread, const TriVertex *vertices, const unsigned int *elements, int count, PolyDrawMode mode)
+{
+	mVertices = vertices;
+	mElements = elements;
+	mVertexCount = count;
 	mDrawMode = mode;
 	thread->DrawQueue->Push<DrawPolyTrianglesCommand>(*this, PolyTriangleDrawer::is_mirror());
 }

src/polyrenderer/drawers/poly_draw_args.h

@@ -83,12 +83,14 @@ public:
 	void SetLights(PolyLight *lights, int numLights) { mLights = lights; mNumLights = numLights; }
 	void SetDynLightColor(uint32_t color) { mDynLightColor = color; }
 	void DrawArray(PolyRenderThread *thread, const TriVertex *vertices, int vcount, PolyDrawMode mode = PolyDrawMode::Triangles);
+	void DrawElements(PolyRenderThread *thread, const TriVertex *vertices, const unsigned int *elements, int count, PolyDrawMode mode = PolyDrawMode::Triangles);
 
 	const TriMatrix *ObjectToClip() const { return mObjectToClip; }
 	const PolyClipPlane &ClipPlane(int index) const { return mClipPlane[index]; }
 
 	const TriVertex *Vertices() const { return mVertices; }
 	int VertexCount() const { return mVertexCount; }
+	const unsigned int *Elements() const { return mElements; }
 	PolyDrawMode DrawMode() const { return mDrawMode; }
 
 	bool FaceCullCCW() const { return mFaceCullCCW; }
@@ -139,6 +141,7 @@ private:
 	const TriMatrix *mObjectToClip = nullptr;
 	const TriVertex *mVertices = nullptr;
 	int mVertexCount = 0;
+	const unsigned int *mElements = nullptr;
 	PolyDrawMode mDrawMode = PolyDrawMode::Triangles;
 	bool mFaceCullCCW = false;
 	bool mDepthTest = false;

src/polyrenderer/drawers/poly_triangle.cpp

@@ -84,6 +84,64 @@ bool PolyTriangleDrawer::is_mirror()
 	return mirror;
 }
 
+void PolyTriangleDrawer::draw_elements(const PolyDrawArgs &drawargs, WorkerThreadData *thread)
+{
+	if (drawargs.VertexCount() < 3)
+		return;
+
+	TriDrawTriangleArgs args;
+	args.dest = dest;
+	args.pitch = dest_pitch;
+	args.clipright = dest_width;
+	args.clipbottom = dest_height;
+	args.uniforms = &drawargs;
+	args.destBgra = dest_bgra;
+	args.stencilPitch = PolyStencilBuffer::Instance()->BlockWidth();
+	args.stencilValues = PolyStencilBuffer::Instance()->Values();
+	args.stencilMasks = PolyStencilBuffer::Instance()->Masks();
+	args.zbuffer = PolyZBuffer::Instance()->Values();
+
+	bool ccw = drawargs.FaceCullCCW();
+	const TriVertex *vinput = drawargs.Vertices();
+	const unsigned int *elements = drawargs.Elements();
+	int vcount = drawargs.VertexCount();
+
+	ShadedTriVertex vert[3];
+	if (drawargs.DrawMode() == PolyDrawMode::Triangles)
+	{
+		for (int i = 0; i < vcount / 3; i++)
+		{
+			for (int j = 0; j < 3; j++)
+				vert[j] = shade_vertex(drawargs, vinput[*(elements++)]);
+			draw_shaded_triangle(vert, ccw, &args, thread);
+		}
+	}
+	else if (drawargs.DrawMode() == PolyDrawMode::TriangleFan)
+	{
+		vert[0] = shade_vertex(drawargs, vinput[*(elements++)]);
+		vert[1] = shade_vertex(drawargs, vinput[*(elements++)]);
+		for (int i = 2; i < vcount; i++)
+		{
+			vert[2] = shade_vertex(drawargs, vinput[*(elements++)]);
+			draw_shaded_triangle(vert, ccw, &args, thread);
+			vert[1] = vert[2];
+		}
+	}
+	else // TriangleDrawMode::TriangleStrip
+	{
+		vert[0] = shade_vertex(drawargs, vinput[*(elements++)]);
+		vert[1] = shade_vertex(drawargs, vinput[*(elements++)]);
+		for (int i = 2; i < vcount; i++)
+		{
+			vert[2] = shade_vertex(drawargs, vinput[*(elements++)]);
+			draw_shaded_triangle(vert, ccw, &args, thread);
+			vert[0] = vert[1];
+			vert[1] = vert[2];
+			ccw = !ccw;
+		}
+	}
+}
+
 void PolyTriangleDrawer::draw_arrays(const PolyDrawArgs &drawargs, WorkerThreadData *thread)
 {
 	if (drawargs.VertexCount() < 3)
@@ -472,7 +530,10 @@ void DrawPolyTrianglesCommand::Execute(DrawerThread *thread)
 	thread_data.core = thread->core;
 	thread_data.num_cores = thread->num_cores;
 
-	PolyTriangleDrawer::draw_arrays(args, &thread_data);
+	if (!args.Elements())
+		PolyTriangleDrawer::draw_arrays(args, &thread_data);
+	else
+		PolyTriangleDrawer::draw_elements(args, &thread_data);
 }
 
 /////////////////////////////////////////////////////////////////////////////

src/polyrenderer/drawers/poly_triangle.h

@@ -40,6 +40,7 @@ public:
 
 private:
 	static ShadedTriVertex shade_vertex(const PolyDrawArgs &drawargs, const TriVertex &v);
+	static void draw_elements(const PolyDrawArgs &args, WorkerThreadData *thread);
 	static void draw_arrays(const PolyDrawArgs &args, WorkerThreadData *thread);
 	static void draw_shaded_triangle(const ShadedTriVertex *vertices, bool ccw, TriDrawTriangleArgs *args, WorkerThreadData *thread);
 	static bool is_degenerate(const ShadedTriVertex *vertices);

src/polyrenderer/poly_all.cpp

@@ -14,6 +14,7 @@
 #include "scene/poly_scene.cpp"
 #include "scene/poly_sky.cpp"
 #include "scene/poly_sprite.cpp"
+#include "scene/poly_model.cpp"
 #include "scene/poly_wall.cpp"
 #include "scene/poly_wallsprite.cpp"
 #include "scene/poly_light.cpp"

src/polyrenderer/poly_renderer.cpp

@@ -208,12 +208,12 @@ void PolyRenderer::SetupPerspectiveMatrix()
 	float fovratio = (Viewwindow.WidescreenRatio >= 1.3f) ? 1.333333f : ratio;
 	float fovy = (float)(2 * DAngle::ToDegrees(atan(tan(Viewpoint.FieldOfView.Radians() / 2) / fovratio)).Degrees);
 
-	TriMatrix worldToView =
+	WorldToView =
 		TriMatrix::rotate(adjustedPitch, 1.0f, 0.0f, 0.0f) *
 		TriMatrix::rotate(adjustedViewAngle, 0.0f, -1.0f, 0.0f) *
 		TriMatrix::scale(1.0f, level.info->pixelstretch, 1.0f) *
 		TriMatrix::swapYZ() *
 		TriMatrix::translate((float)-Viewpoint.Pos.X, (float)-Viewpoint.Pos.Y, (float)-Viewpoint.Pos.Z);
 
-	WorldToClip = TriMatrix::perspective(fovy, ratio, 5.0f, 65535.0f) * worldToView;
+	WorldToClip = TriMatrix::perspective(fovy, ratio, 5.0f, 65535.0f) * WorldToView;
 }

src/polyrenderer/poly_renderer.h

@@ -61,13 +61,15 @@ public:
 	FRenderViewpoint Viewpoint;
 	PolyLightVisibility Light;
 
+	TriMatrix WorldToView;
+	TriMatrix WorldToClip;
+
 private:
 	void RenderActorView(AActor *actor, bool dontmaplines);
 	void ClearBuffers();
 	void SetSceneViewport();
 	void SetupPerspectiveMatrix();
 
-	TriMatrix WorldToClip;
 	RenderPolyScene MainPortal;
 	PolySkyDome Skydome;
 	RenderPolyPlayerSprites PlayerSprites;

src/polyrenderer/scene/poly_model.cpp

@@ -0,0 +1,255 @@
+/*
+**  Polygon Doom software renderer
+**  Copyright (c) 2016 Magnus Norddahl
+**
+**  This software is provided 'as-is', without any express or implied
+**  warranty.  In no event will the authors be held liable for any damages
+**  arising from the use of this software.
+**
+**  Permission is granted to anyone to use this software for any purpose,
+**  including commercial applications, and to alter it and redistribute it
+**  freely, subject to the following restrictions:
+**
+**  1. The origin of this software must not be misrepresented; you must not
+**     claim that you wrote the original software. If you use this software
+**     in a product, an acknowledgment in the product documentation would be
+**     appreciated but is not required.
+**  2. Altered source versions must be plainly marked as such, and must not be
+**     misrepresented as being the original software.
+**  3. This notice may not be removed or altered from any source distribution.
+**
+*/
+
+#include <stdlib.h>
+#include "templates.h"
+#include "doomdef.h"
+#include "sbar.h"
+#include "r_data/r_translate.h"
+#include "poly_model.h"
+#include "polyrenderer/poly_renderer.h"
+#include "polyrenderer/scene/poly_light.h"
+#include "polyrenderer/poly_renderthread.h"
+#include "r_data/r_vanillatrans.h"
+#include "actorinlines.h"
+
+void PolyRenderModel(PolyRenderThread *thread, const TriMatrix &worldToClip, const PolyClipPlane &clipPlane, uint32_t stencilValue, float x, float y, float z, FSpriteModelFrame *smf, AActor *actor)
+{
+	PolyModelRenderer renderer(thread, worldToClip, clipPlane, stencilValue);
+	renderer.RenderModel(x, y, z, smf, actor);
+}
+
+void PolyRenderHUDModel(PolyRenderThread *thread, const TriMatrix &worldToClip, const PolyClipPlane &clipPlane, uint32_t stencilValue, DPSprite *psp, float ofsx, float ofsy)
+{
+	PolyModelRenderer renderer(thread, worldToClip, clipPlane, stencilValue);
+	renderer.RenderHUDModel(psp, ofsx, ofsy);
+}
+
+/////////////////////////////////////////////////////////////////////////////
+
+void PolyModelRenderer::BeginDrawModel(AActor *actor, FSpriteModelFrame *smf, const VSMatrix &objectToWorldMatrix)
+{
+	ModelActor = actor;
+	const_cast<VSMatrix &>(objectToWorldMatrix).copy(ObjectToWorld.matrix);
+}
+
+void PolyModelRenderer::EndDrawModel(AActor *actor, FSpriteModelFrame *smf)
+{
+	ModelActor = nullptr;
+}
+
+IModelVertexBuffer *PolyModelRenderer::CreateVertexBuffer(bool needindex, bool singleframe)
+{
+	return new PolyModelVertexBuffer(needindex, singleframe);
+}
+
+void PolyModelRenderer::SetVertexBuffer(IModelVertexBuffer *buffer)
+{
+}
+
+void PolyModelRenderer::ResetVertexBuffer()
+{
+}
+
+VSMatrix PolyModelRenderer::GetViewToWorldMatrix()
+{
+	TriMatrix swapYZ = TriMatrix::null();
+	swapYZ.matrix[0 + 0 * 4] = 1.0f;
+	swapYZ.matrix[1 + 2 * 4] = 1.0f;
+	swapYZ.matrix[2 + 1 * 4] = 1.0f;
+	swapYZ.matrix[3 + 3 * 4] = 1.0f;
+
+	VSMatrix worldToView;
+	worldToView.loadMatrix((PolyRenderer::Instance()->WorldToView * swapYZ).matrix);
+	
+	VSMatrix objectToWorld;
+	worldToView.inverseMatrix(objectToWorld);
+	return objectToWorld;
+}
+
+void PolyModelRenderer::BeginDrawHUDModel(AActor *actor, const VSMatrix &objectToWorldMatrix)
+{
+	ModelActor = actor;
+	const_cast<VSMatrix &>(objectToWorldMatrix).copy(ObjectToWorld.matrix);
+}
+
+void PolyModelRenderer::EndDrawHUDModel(AActor *actor)
+{
+	ModelActor = nullptr;
+}
+
+void PolyModelRenderer::SetInterpolation(double interpolation)
+{
+	InterpolationFactor = (float)interpolation;
+}
+
+void PolyModelRenderer::SetMaterial(FTexture *skin, int clampmode, int translation)
+{
+	SkinTexture = skin;
+}
+
+void PolyModelRenderer::DrawArrays(int primitiveType, int start, int count)
+{
+	const auto &viewpoint = PolyRenderer::Instance()->Viewpoint;
+
+	bool foggy = false;
+	int actualextralight = foggy ? 0 : viewpoint.extralight << 4;
+	sector_t *sector = ModelActor->Sector;
+
+	bool fullbrightSprite = ((ModelActor->renderflags & RF_FULLBRIGHT) || (ModelActor->flags5 & MF5_BRIGHT));
+	int lightlevel = fullbrightSprite ? 255 : ModelActor->Sector->lightlevel + actualextralight;
+
+	TriMatrix swapYZ = TriMatrix::null();
+	swapYZ.matrix[0 + 0 * 4] = 1.0f;
+	swapYZ.matrix[1 + 2 * 4] = 1.0f;
+	swapYZ.matrix[2 + 1 * 4] = 1.0f;
+	swapYZ.matrix[3 + 3 * 4] = 1.0f;
+
+	TriMatrix *transform = Thread->FrameMemory->NewObject<TriMatrix>();
+	*transform = WorldToClip * swapYZ * ObjectToWorld;
+
+	PolyDrawArgs args;
+	args.SetLight(GetColorTable(sector->Colormap, sector->SpecialColors[sector_t::sprites], true), lightlevel, PolyRenderer::Instance()->Light.SpriteGlobVis(foggy), fullbrightSprite);
+	args.SetTransform(transform);
+	args.SetFaceCullCCW(true);
+	args.SetStencilTestValue(StencilValue);
+	args.SetClipPlane(0, PolyClipPlane());
+	args.SetStyle(TriBlendMode::TextureOpaque);
+	args.SetTexture(SkinTexture);
+	args.SetDepthTest(true);
+	args.SetWriteDepth(true);
+	args.SetWriteStencil(false);
+	args.DrawArray(Thread, VertexBuffer + start, count);
+}
+
+void PolyModelRenderer::DrawElements(int primitiveType, int numIndices, int elementType, size_t offset)
+{
+	const auto &viewpoint = PolyRenderer::Instance()->Viewpoint;
+
+	bool foggy = false;
+	int actualextralight = foggy ? 0 : viewpoint.extralight << 4;
+	sector_t *sector = ModelActor->Sector;
+
+	bool fullbrightSprite = ((ModelActor->renderflags & RF_FULLBRIGHT) || (ModelActor->flags5 & MF5_BRIGHT));
+	int lightlevel = fullbrightSprite ? 255 : ModelActor->Sector->lightlevel + actualextralight;
+
+	TriMatrix swapYZ = TriMatrix::null();
+	swapYZ.matrix[0 + 0 * 4] = 1.0f;
+	swapYZ.matrix[1 + 2 * 4] = 1.0f;
+	swapYZ.matrix[2 + 1 * 4] = 1.0f;
+	swapYZ.matrix[3 + 3 * 4] = 1.0f;
+
+	TriMatrix *transform = Thread->FrameMemory->NewObject<TriMatrix>();
+	*transform = WorldToClip * swapYZ * ObjectToWorld;
+
+	PolyDrawArgs args;
+	args.SetLight(GetColorTable(sector->Colormap, sector->SpecialColors[sector_t::sprites], true), lightlevel, PolyRenderer::Instance()->Light.SpriteGlobVis(foggy), fullbrightSprite);
+	args.SetTransform(transform);
+	args.SetFaceCullCCW(true);
+	args.SetStencilTestValue(StencilValue);
+	args.SetClipPlane(0, PolyClipPlane());
+	args.SetStyle(TriBlendMode::TextureOpaque);
+	args.SetTexture(SkinTexture);
+	args.SetDepthTest(true);
+	args.SetWriteDepth(true);
+	args.SetWriteStencil(false);
+	args.DrawElements(Thread, VertexBuffer, IndexBuffer + offset / sizeof(unsigned int), numIndices);
+}
+
+float PolyModelRenderer::GetTimeFloat()
+{
+	return 0.0f; // (float)gl_frameMS * (float)TICRATE / 1000.0f;
+}
+
+/////////////////////////////////////////////////////////////////////////////
+
+PolyModelVertexBuffer::PolyModelVertexBuffer(bool needindex, bool singleframe)
+{
+}
+
+PolyModelVertexBuffer::~PolyModelVertexBuffer()
+{
+}
+
+FModelVertex *PolyModelVertexBuffer::LockVertexBuffer(unsigned int size)
+{
+	mVertexBuffer.Resize(size);
+	return &mVertexBuffer[0];
+}
+
+void PolyModelVertexBuffer::UnlockVertexBuffer()
+{
+}
+
+unsigned int *PolyModelVertexBuffer::LockIndexBuffer(unsigned int size)
+{
+	mIndexBuffer.Resize(size);
+	return &mIndexBuffer[0];
+}
+
+void PolyModelVertexBuffer::UnlockIndexBuffer()
+{
+}
+
+void PolyModelVertexBuffer::SetupFrame(FModelRenderer *renderer, unsigned int frame1, unsigned int frame2, unsigned int size)
+{
+	PolyModelRenderer *polyrenderer = (PolyModelRenderer *)renderer;
+
+	if (true)//if (frame1 == frame2 || size == 0 || polyrenderer->InterpolationFactor == 0.f)
+	{
+		TriVertex *vertices = polyrenderer->Thread->FrameMemory->AllocMemory<TriVertex>(size);
+
+		for (unsigned int i = 0; i < size; i++)
+		{
+			vertices[i] =
+			{
+				mVertexBuffer[frame1 + i].x,
+				mVertexBuffer[frame1 + i].y,
+				mVertexBuffer[frame1 + i].z,
+				1.0f,
+				mVertexBuffer[frame1 + i].u,
+				mVertexBuffer[frame1 + i].v
+			};
+		}
+
+		polyrenderer->VertexBuffer = vertices;
+		polyrenderer->IndexBuffer = &mIndexBuffer[0];
+	}
+	else
+	{
+		TriVertex *vertices = polyrenderer->Thread->FrameMemory->AllocMemory<TriVertex>(size);
+
+		float frac = polyrenderer->InterpolationFactor;
+		for (unsigned int i = 0; i < size; i++)
+		{
+			vertices[i].x = mVertexBuffer[frame1 + i].x * (1.0f - frac) + mVertexBuffer[frame2 + i].x * frac;
+			vertices[i].y = mVertexBuffer[frame1 + i].y * (1.0f - frac) + mVertexBuffer[frame2 + i].y * frac;
+			vertices[i].z = mVertexBuffer[frame1 + i].z * (1.0f - frac) + mVertexBuffer[frame2 + i].z * frac;
+			vertices[i].w = 1.0f;
+			vertices[i].u = mVertexBuffer[frame1 + i].u;
+			vertices[i].v = mVertexBuffer[frame1 + i].v;
+		}
+
+		polyrenderer->VertexBuffer = vertices;
+		polyrenderer->IndexBuffer = &mIndexBuffer[0];
+	}
+}

src/polyrenderer/scene/poly_model.h

@@ -0,0 +1,82 @@
+/*
+**  Polygon Doom software renderer
+**  Copyright (c) 2016 Magnus Norddahl
+**
+**  This software is provided 'as-is', without any express or implied
+**  warranty.  In no event will the authors be held liable for any damages
+**  arising from the use of this software.
+**
+**  Permission is granted to anyone to use this software for any purpose,
+**  including commercial applications, and to alter it and redistribute it
+**  freely, subject to the following restrictions:
+**
+**  1. The origin of this software must not be misrepresented; you must not
+**     claim that you wrote the original software. If you use this software
+**     in a product, an acknowledgment in the product documentation would be
+**     appreciated but is not required.
+**  2. Altered source versions must be plainly marked as such, and must not be
+**     misrepresented as being the original software.
+**  3. This notice may not be removed or altered from any source distribution.
+**
+*/
+
+#pragma once
+
+#include "polyrenderer/drawers/poly_triangle.h"
+#include "gl/data/gl_matrix.h"
+#include "gl/models/gl_models.h"
+
+void PolyRenderModel(PolyRenderThread *thread, const TriMatrix &worldToClip, const PolyClipPlane &clipPlane, uint32_t stencilValue, float x, float y, float z, FSpriteModelFrame *smf, AActor *actor);
+void PolyRenderHUDModel(PolyRenderThread *thread, const TriMatrix &worldToClip, const PolyClipPlane &clipPlane, uint32_t stencilValue, DPSprite *psp, float ofsx, float ofsy);
+
+class PolyModelRenderer : public FModelRenderer
+{
+public:
+	PolyModelRenderer(PolyRenderThread *thread, const TriMatrix &worldToClip, const PolyClipPlane &clipPlane, uint32_t stencilValue) : Thread(thread), WorldToClip(worldToClip), ClipPlane(clipPlane), StencilValue(stencilValue) { }
+
+	void BeginDrawModel(AActor *actor, FSpriteModelFrame *smf, const VSMatrix &objectToWorldMatrix) override;
+	void EndDrawModel(AActor *actor, FSpriteModelFrame *smf) override;
+	IModelVertexBuffer *CreateVertexBuffer(bool needindex, bool singleframe) override;
+	void SetVertexBuffer(IModelVertexBuffer *buffer) override;
+	void ResetVertexBuffer() override;
+	VSMatrix GetViewToWorldMatrix() override;
+	void BeginDrawHUDModel(AActor *actor, const VSMatrix &objectToWorldMatrix) override;
+	void EndDrawHUDModel(AActor *actor) override;
+	void SetInterpolation(double interpolation) override;
+	void SetMaterial(FTexture *skin, int clampmode, int translation) override;
+	void DrawArrays(int primitiveType, int start, int count) override;
+	void DrawElements(int primitiveType, int numIndices, int elementType, size_t offset) override;
+	float GetTimeFloat() override;
+
+	PolyRenderThread *Thread = nullptr;
+	const TriMatrix &WorldToClip;
+	const PolyClipPlane &ClipPlane;
+	uint32_t StencilValue = 0;
+
+	AActor *ModelActor = nullptr;
+	TriMatrix ObjectToWorld;
+	FTexture *SkinTexture = nullptr;
+	unsigned int *IndexBuffer = nullptr;
+	TriVertex *VertexBuffer = nullptr;
+	float InterpolationFactor = 0.0;
+};
+
+class PolyModelVertexBuffer : public IModelVertexBuffer
+{
+public:
+	PolyModelVertexBuffer(bool needindex, bool singleframe);
+	~PolyModelVertexBuffer();
+
+	FModelVertex *LockVertexBuffer(unsigned int size) override;
+	void UnlockVertexBuffer() override;
+
+	unsigned int *LockIndexBuffer(unsigned int size) override;
+	void UnlockIndexBuffer() override;
+
+	void SetupFrame(FModelRenderer *renderer, unsigned int frame1, unsigned int frame2, unsigned int size) override;
+
+private:
+	int mIndexFrame[2];
+	TArray<FModelVertex> mVertexBuffer;
+	TArray<unsigned int> mIndexBuffer;
+};

src/polyrenderer/scene/poly_playersprite.cpp

@@ -29,6 +29,7 @@
 #include "polyrenderer/poly_renderer.h"
 #include "d_player.h"
 #include "polyrenderer/scene/poly_light.h"
+#include "polyrenderer/scene/poly_model.h"
 
 EXTERN_CVAR(Bool, r_drawplayersprites)
 EXTERN_CVAR(Bool, r_deathcamera)
@@ -39,6 +40,10 @@ void RenderPolyPlayerSprites::Render(PolyRenderThread *thread)
 {
 	// This code cannot be moved directly to RenderRemainingSprites because the engine
 	// draws the canvas textures between this call and the final call to RenderRemainingSprites..
+	//
+	// We also can't move it because the model render code relies on it
+
+	renderHUDModel = gl_IsHUDModelForPlayerAvailable(players[consoleplayer].camera->player);
 
 	const auto &viewpoint = PolyRenderer::Instance()->Viewpoint;
 
@@ -244,6 +249,12 @@ void RenderPolyPlayerSprites::RenderSprite(PolyRenderThread *thread, DPSprite *p
 		sy += wy;
 	}
 
+	if (renderHUDModel)
+	{
+		PolyRenderHUDModel(thread, PolyRenderer::Instance()->WorldToClip, PolyClipPlane(), 1, pspr, (float)sx, (float)sy);
+		return;
+	}
+
 	double yaspectMul = 1.2 * ((double)SCREENHEIGHT / SCREENWIDTH) * r_viewwindow.WidescreenRatio;
 
 	double pspritexscale = viewwindow.centerxwide / 160.0;

src/polyrenderer/scene/poly_playersprite.h

@@ -102,4 +102,5 @@ private:
 
 	TArray<PolyHWAccelPlayerSprite> AcceleratedSprites;
 	sector_t tempsec;
+	bool renderHUDModel = false;
 };

src/polyrenderer/scene/poly_sprite.cpp

@@ -29,6 +29,7 @@
 #include "polyrenderer/poly_renderer.h"
 #include "polyrenderer/scene/poly_light.h"
 #include "polyrenderer/poly_renderthread.h"
+#include "polyrenderer/scene/poly_model.h"
 #include "r_data/r_vanillatrans.h"
 #include "actorinlines.h"
 
@@ -73,6 +74,17 @@ bool RenderPolySprite::GetLine(AActor *thing, DVector2 &left, DVector2 &right)
 
 void RenderPolySprite::Render(PolyRenderThread *thread, const TriMatrix &worldToClip, const PolyClipPlane &clipPlane, AActor *thing, subsector_t *sub, uint32_t stencilValue, float t1, float t2)
 {
+	int spritenum = thing->sprite;
+	bool isPicnumOverride = thing->picnum.isValid();
+	FSpriteModelFrame *modelframe = isPicnumOverride ? nullptr : gl_FindModelFrame(thing->GetClass(), spritenum, thing->frame, !!(thing->flags & MF_DROPPED));
+	if (modelframe)
+	{
+		const auto &viewpoint = PolyRenderer::Instance()->Viewpoint;
+		DVector3 pos = thing->InterpolatedPosition(viewpoint.TicFrac);
+		PolyRenderModel(thread, worldToClip, clipPlane, stencilValue, (float)pos.X, (float)pos.Y, (float)pos.Z, modelframe, thing);
+		return;
+	}
+
 	DVector2 line[2];
 	if (!GetLine(thing, line[0], line[1]))
 		return;