From ed22260822086f84016aa8384c3174bfc6d1739d Mon Sep 17 00:00:00 2001
From: Lars <larsh@apache.org>
Date: Mon, 12 Oct 2020 13:29:31 -0700
Subject: Remove all bump mapping and parallax occlusion related code.

---
 client/shaders/nodes_shader/opengl_fragment.glsl | 99 ------------------------
 1 file changed, 99 deletions(-)

(limited to 'client/shaders/nodes_shader/opengl_fragment.glsl')

diff --git a/client/shaders/nodes_shader/opengl_fragment.glsl b/client/shaders/nodes_shader/opengl_fragment.glsl
index 437b325d3..36d47d1f5 100644
--- a/client/shaders/nodes_shader/opengl_fragment.glsl
+++ b/client/shaders/nodes_shader/opengl_fragment.glsl
@@ -1,6 +1,4 @@
 uniform sampler2D baseTexture;
-uniform sampler2D normalTexture;
-uniform sampler2D textureFlags;
 
 uniform vec4 skyBgColor;
 uniform float fogDistance;
@@ -17,17 +15,9 @@ varying vec3 vPosition;
 // cameraOffset + worldPosition (for large coordinates the limits of float
 // precision must be considered).
 varying vec3 worldPosition;
-varying float area_enable_parallax;
 
 varying vec3 eyeVec;
-varying vec3 tsEyeVec;
-varying vec3 lightVec;
-varying vec3 tsLightVec;
 
-bool normalTexturePresent = false;
-
-const float e = 2.718281828459;
-const float BS = 10.0;
 const float fogStart = FOG_START;
 const float fogShadingParameter = 1 / ( 1 - fogStart);
 
@@ -63,87 +53,10 @@ vec4 applyToneMapping(vec4 color)
 }
 #endif
 
-void get_texture_flags()
-{
-	vec4 flags = texture2D(textureFlags, vec2(0.0, 0.0));
-	if (flags.r > 0.5) {
-		normalTexturePresent = true;
-	}
-}
-
-vec4 get_normal_map(vec2 uv)
-{
-	vec4 bump = texture2D(normalTexture, uv).rgba;
-	bump.xyz = normalize(bump.xyz * 2.0 - 1.0);
-	return bump;
-}
-
-float find_intersection(vec2 dp, vec2 ds)
-{
-	float depth = 1.0;
-	float best_depth = 0.0;
-	float size = 0.0625;
-	for (int i = 0; i < 15; i++) {
-		depth -= size;
-		float h = texture2D(normalTexture, dp + ds * depth).a;
-		if (depth <= h) {
-			best_depth = depth;
-			break;
-		}
-	}
-	depth = best_depth;
-	for (int i = 0; i < 4; i++) {
-		size *= 0.5;
-		float h = texture2D(normalTexture,dp + ds * depth).a;
-		if (depth <= h) {
-			best_depth = depth;
-			depth += size;
-		} else {
-			depth -= size;
-		}
-	}
-	return best_depth;
-}
-
 void main(void)
 {
 	vec3 color;
-	vec4 bump;
 	vec2 uv = gl_TexCoord[0].st;
-	bool use_normalmap = false;
-	get_texture_flags();
-
-#ifdef ENABLE_PARALLAX_OCCLUSION
-	vec2 eyeRay = vec2 (tsEyeVec.x, -tsEyeVec.y);
-	const float scale = PARALLAX_OCCLUSION_SCALE / PARALLAX_OCCLUSION_ITERATIONS;
-	const float bias = PARALLAX_OCCLUSION_BIAS / PARALLAX_OCCLUSION_ITERATIONS;
-
-#if PARALLAX_OCCLUSION_MODE == 0
-	// Parallax occlusion with slope information
-	if (normalTexturePresent && area_enable_parallax > 0.0) {
-		for (int i = 0; i < PARALLAX_OCCLUSION_ITERATIONS; i++) {
-			vec4 normal = texture2D(normalTexture, uv.xy);
-			float h = normal.a * scale - bias;
-			uv += h * normal.z * eyeRay;
-		}
-	}
-#endif
-#if PARALLAX_OCCLUSION_MODE == 1
-	// Relief mapping
-	if (normalTexturePresent && area_enable_parallax > 0.0) {
-		vec2 ds = eyeRay * PARALLAX_OCCLUSION_SCALE;
-		float dist = find_intersection(uv, ds);
-		uv += dist * ds;
-	}
-#endif
-#endif
-
-#if USE_NORMALMAPS == 1
-	if (normalTexturePresent) {
-		bump = get_normal_map(uv);
-		use_normalmap = true;
-	}
-#endif
 
 	vec4 base = texture2D(baseTexture, uv).rgba;
 
@@ -155,19 +68,7 @@ void main(void)
 	}
 #endif
 
-#ifdef ENABLE_BUMPMAPPING
-	if (use_normalmap) {
-		vec3 L = normalize(lightVec);
-		vec3 E = normalize(eyeVec);
-		float specular = pow(clamp(dot(reflect(L, bump.xyz), E), 0.0, 1.0), 1.0);
-		float diffuse = dot(-E,bump.xyz);
-		color = (diffuse + 0.1 * specular) * base.rgb;
-	} else {
-		color = base.rgb;
-	}
-#else
 	color = base.rgb;
-#endif
 
 	vec4 col = vec4(color.rgb * gl_Color.rgb, 1.0); 
 	
-- 
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