mobile vehicle rendering

1 files changed, 76 insertions, 0 deletions

diff --git a/src/extras/shaders/leedsVehicle_mobile.frag b/src/extras/shaders/leedsVehicle_mobile.frag
new file mode 100644
index 00000000..467379dd
--- /dev/null
+++ b/src/extras/shaders/leedsVehicle_mobile.frag
@@ -0,0 +1,76 @@
+uniform sampler2D tex0;
+uniform sampler2D tex1;
+
+uniform float u_fxparams;
+uniform vec3 u_skyTop;
+uniform vec3 u_skyBot;
+
+#define shininess (u_fxparams)
+
+// matfx:
+// case 1	normal envmap
+// 	custom1 (4.0,  1.0, 1.0, coef)
+// 	custom2 (0.25, 3.0, 1.0, 1.0)
+// case 2	too strong
+// 	custom1 (4.0, 1.0, 2.0, coef)
+// 	custom2 (0.5, 3.0, 1.0, 1.0)
+// ???:		practically no fresnel
+// 	custom1 (4.0, 1.25, 0.01, coef)
+// 	custom2 (1.0, 2.0,  1.1,  2.0)
+
+#define power (4.0)
+
+#define preMult (1.0)
+#define postMult (1.0)
+#define minRefl (0.25)
+#define maxRefl (3.0)
+#define minOpacity (1.0)
+#define maxOpacity (1.0)
+
+//#define preMult (1.0)
+//#define postMult (2.0)
+//#define minRefl (0.5)
+//#define maxRefl (3.0)
+//#define minOpacity (1.0)
+//#define maxOpacity (1.0)
+
+//#define preMult (1.25)
+//#define postMult (0.01)
+//#define minRefl (1.0)
+//#define maxRefl (2.0)
+//#define minOpacity (1.1)
+//#define maxOpacity (2.0)
+
+FSIN vec4 v_color;
+FSIN vec2 v_tex0;
+FSIN vec2 v_tex1;
+FSIN float v_fog;
+FSIN vec2 v_reflData;
+
+#define v_NdotV (v_reflData.x)
+#define v_lightingCont (v_reflData.y)
+
+void
+main(void)
+{
+	vec4 pass1 = v_color*texture(tex0, vec2(v_tex0.x, 1.0-v_tex0.y));
+
+	vec3 envtex = texture(tex1, v_tex1).rgb;	// V flipped
+	vec3 skyColour = mix(u_skyBot, u_skyTop, envtex.g);
+	vec3 envOut = mix(envtex.rrr, skyColour, envtex.b);
+
+	float fresnel = mix(shininess, shininess * 2.0, v_NdotV);
+	fresnel = pow(v_NdotV * preMult, power);
+	fresnel = clamp(fresnel * postMult, 0.0, 1.0);
+	float reflectivity = v_lightingCont * mix(minRefl, maxRefl, fresnel)*shininess;
+
+	float opacity = mix(minOpacity, maxOpacity, fresnel)*pass1.a;
+	vec4 color = pass1 + vec4(reflectivity * envOut, 0.0);
+	color.a = opacity;
+
+	color.rgb = mix(u_fogColor.rgb, color.rgb, v_fog);
+
+	DoAlphaTest(color.a);
+
+	FRAGCOLOR(color);
+}