Changed to 512x240 high resolution output, and implemented aspect ratio correction.

main.c

@@ -27,7 +27,7 @@
 
 #define OTLEN	256
 
-#define SCREENWIDTH		320
+#define SCREENWIDTH		512
 #define SCREENHEIGHT	240
 
 #define NUMVERTEXNORMALS	162
@@ -78,8 +78,8 @@ typedef struct
 	ps1texture_t front, back;
 } ps1skin_t;
 
-ps1mdl_t playerModel = { .position = { -128, 320, 400 }, .rotation = { 0 } };
-ps1mdl_t shamblerModel = { .position = { 128, 320, 400 }, .rotation = { 0 } };
+ps1mdl_t playerModel = { .position = { -200, 320, 400 }, .rotation = { 0 } };
+ps1mdl_t shamblerModel = { .position = { 200, 320, 400 }, .rotation = { 0 } };
 ps1skin_t playerSkin, shamblerSkin;
 
 MATRIX color_mtx = {
@@ -94,6 +94,9 @@ MATRIX light_mtx = {
 	0, 0, 0
 };
 
+// Scale X coordinates to correct the aspect ratio for the chosen resolution
+VECTOR cam_scale = { SCREENWIDTH * ONE / 320 , ONE, ONE };
+
 void loadModel(const u_long* data, ps1mdl_t *mdl)
 {
 	const char *bytes = (const char*)data;
@@ -188,7 +191,7 @@ void init(void)
 
 	InitGeom();
 	gte_SetGeomOffset(SCREENWIDTH >> 1, SCREENHEIGHT >> 1);
-	gte_SetGeomScreen(SCREENWIDTH >> 1);	// Screen depth for FOV control
+	gte_SetGeomScreen(180);	// Screen depth for FOV control. Essentially the Z position of the vanishing point.
 
 	// Set texture page for the entire drawing environment. Nice in some cases perhaps, but not what we need.
 	//draw[0].tpage = getTPage(playerFrontTex.mode & 0x3, 0, playerFrontTex.prect->x, playerFrontTex.prect->y);
@@ -358,6 +361,7 @@ void drawModel(ps1mdl_t *model, ps1skin_t *skin, int xOffset, int frameCounter)
 
 	MATRIX mtx, lmtx;
 	RotMatrix(&model->rotation, &mtx);
+	ScaleMatrixL(&mtx, &cam_scale);		// Aspect ratio correction
 	TransMatrix(&mtx, &model->position);
 	MulMatrix0(&light_mtx, &mtx, &lmtx);