- scale the vertex coordinates that get output to the hardware by 1024.

This is needed to get a coordinate system that is compatible with GZDoom's so that its lighting code can be reused more easily.

source/build/src/mdsprite.cpp

@@ -1645,7 +1645,9 @@ static int32_t polymost_md3draw(md3model_t *m, tspriteptr_t tspr)
 
     int prevClamp = GLInterface.GetClamp();
 	GLInterface.SetClamp(0);
-    auto matrixindex = GLInterface.SetIdentityMatrix(Matrix_Model);
+    VSMatrix imat = 0;
+    imat.scale(1024, 1024, 1024);
+    auto matrixindex = GLInterface.SetMatrix(Matrix_Model, &imat);
 
     for (surfi=0; surfi<m->head.numsurfs; surfi++)
     {
@@ -1700,7 +1702,8 @@ static int32_t polymost_md3draw(md3model_t *m, tspriteptr_t tspr)
 
         //Let OpenGL (and perhaps hardware :) handle the matrix rotation
         mat[3] = mat[7] = mat[11] = 0.f; mat[15] = 1.f;
-		GLInterface.SetMatrix(Matrix_Model, mat);
+        for (int i = 0; i < 15; i++) mat[i] *= 1024.f;
+        GLInterface.SetMatrix(Matrix_Model, mat);
         // PLAG: End
 
 		bool exact = false;

source/build/src/polymost.cpp

@@ -198,8 +198,8 @@ static void resizeglcheck(void)
 
     float m[4][4]{};
 
-    float const nearclip = 4.0f / (gxyaspect * gyxscale * 1024.f);
+    float const nearclip = 4.0f / (gxyaspect * gyxscale);
-    float const farclip = 64.f;
+    float const farclip = 65536.f;
 
     m[0][0] = 1.f;
     m[1][1] = fxdimen / (fydimen * ratio);
@@ -474,9 +474,9 @@ static void polymost_drawpoly(vec2f_t const * const dpxy, int32_t const n, int32
 
         //update verts
 		vt->SetVertex(
-			(px[i] - ghalfx) * r * grhalfxdown10x,
+			(px[i] - ghalfx) * r * grhalfxdown10x * 1024.f,
-			(ghalfy - py[i]) * r * grhalfxdown10,
+			(ghalfy - py[i]) * r * grhalfxdown10 * 1024.f,
-			r * (1.f / 1024.f));
+			r);
 
     }
 	GLInterface.Draw(DT_TriangleFan, data.second, npoints);

source/build/src/voxmodel.cpp

@@ -1122,7 +1122,9 @@ int32_t polymost_voxdraw(voxmodel_t *m, tspriteptr_t const tspr)
     //Let OpenGL (and perhaps hardware :) handle the matrix rotation
     mat[3] = mat[7] = mat[11] = 0.f; mat[15] = 1.f;
 
-	int matrixindex = GLInterface.SetMatrix(Matrix_Model, mat);
+    for (int i = 0; i < 15; i++) mat[i] *= 1024.f;
+
+    int matrixindex = GLInterface.SetMatrix(Matrix_Model, mat);
 
     const float ru = 1.f/((float)m->mytexx);
     const float rv = 1.f/((float)m->mytexy);

source/glbackend/glbackend.h

@@ -210,7 +210,7 @@ public:
 
 	void SetVisibility(float visibility, float fviewingrange)
 	{
-		renderState.VisFactor = visibility* fviewingrange* (1.f / (64.f * 65536.f));
+		renderState.VisFactor = visibility* fviewingrange* (1.f / (65536.f * 65536.f));
 	}
 
 	void EnableBlend(bool on)

wadsrc/static/engine/shaders/glsl/polymost.fp

@@ -223,7 +223,7 @@ void main()
 		}
 		if ((u_flags & RF_MapFog) != 0) // fog hack for RRRA E2L1. Needs to be done better, this is gross, but still preferable to the broken original implementation.
 		{
-			float fogfactor = 0.55 + 0.3 * exp2 (-5.0*v_fogCoord); 		
+			float fogfactor = 0.55 + 0.3 * exp2 ((-5.0 / 1024.0)*v_distance); 		
 			color.rgb = vec3(0.6*(1.0-fogfactor)) + color.rgb * fogfactor;// mix(vec3(0.6), color.rgb, fogfactor);
 		}
 		if (color.a < u_alphaThreshold) discard;	// it's only here that we have the alpha value available to be able to perform the alpha test.

wadsrc/static/engine/shaders/glsl/polymost.vp

@@ -4,7 +4,6 @@ out vec4 v_color;
 out float v_distance;
 out vec4 v_texCoord;
 out vec4 v_detailCoord;
-out float v_fogCoord;
 out vec4 v_eyeCoordPosition;
 
 uniform float u_usePalette;
@@ -32,7 +31,6 @@ void main()
    v_texCoord = u_textureMatrix * i_texCoord;
    v_detailCoord = vec4(i_texCoord.x * u_detailParms.x, i_texCoord.y * u_detailParms.y, 0.0, 0.0);
 
-   v_fogCoord = abs(eyeCoordPosition.z);
 
    v_color = i_color;
    v_distance = eyeCoordPosition.z;