OpenGL2: Fix TCGEN_ENVIRONMENT stages not rendering correctly.

code/renderergl2/tr_local.h

@@ -84,7 +84,8 @@ typedef struct {
 	qboolean	needDlights;	// true for bmodels that touch a dlight
 	qboolean	lightingCalculated;
 	qboolean	mirrored;		// mirrored matrix, needs reversed culling
-	vec3_t		lightDir;		// normalized direction towards light
+	vec3_t		lightDir;		// normalized direction towards light, in world space
+	vec3_t      modelLightDir;  // normalized direction towards light, in model space
 	vec3_t		ambientLight;	// color normalized to 0-255
 	int			ambientLightInt;	// 32 bit rgba packed
 	vec3_t		directedLight;
@@ -764,6 +765,7 @@ typedef enum
 	UNIFORM_LIGHTUP,
 	UNIFORM_LIGHTRIGHT,
 	UNIFORM_LIGHTORIGIN,
+	UNIFORM_MODELLIGHTDIR,
 	UNIFORM_LIGHTRADIUS,
 	UNIFORM_AMBIENTLIGHT,
 	UNIFORM_DIRECTEDLIGHT,
@@ -784,6 +786,7 @@ typedef enum
 
 	UNIFORM_VIEWINFO, // znear, zfar, width/2, height/2
 	UNIFORM_VIEWORIGIN,
+	UNIFORM_LOCALVIEWORIGIN,
 	UNIFORM_VIEWFORWARD,
 	UNIFORM_VIEWLEFT,
 	UNIFORM_VIEWUP,