1 files changed, 40 insertions, 0 deletions
diff --git a/src/datavisualization/engine/shaders/texture_ES2.frag b/src/datavisualization/engine/shaders/texture_ES2.frag
new file mode 100644
index 00000000..82ad6614
--- /dev/null
+++ b/src/datavisualization/engine/shaders/texture_ES2.frag
@@ -0,0 +1,40 @@
+varying highp vec2 UV;
+varying highp vec2 coords_mdl;
+varying highp vec3 position_wrld;
+varying highp vec3 normal_cmr;
+varying highp vec3 eyeDirection_cmr;
+varying highp vec3 lightDirection_cmr;
+varying highp vec3 lightPosition_wrld_frag;
+
+uniform highp sampler2D textureSampler;
+uniform highp float lightStrength;
+uniform highp float ambientStrength;
+uniform highp vec4 lightColor;
+
+void main() {
+    highp vec3 materialDiffuseColor = texture2D(textureSampler, UV).rgb;
+    highp vec3 materialAmbientColor = lightColor.rgb * ambientStrength * materialDiffuseColor;
+    highp vec3 materialSpecularColor = lightColor.rgb;
+
+    highp float distance = length(lightPosition_wrld_frag - position_wrld);
+
+    highp vec3 n = normalize(normal_cmr);
+    highp vec3 l = normalize(lightDirection_cmr);
+    highp float cosTheta = dot(n, l);
+    if (cosTheta < 0.0) cosTheta = 0.0;
+    else if (cosTheta > 1.0) cosTheta = 1.0;
+
+    highp vec3 E = normalize(eyeDirection_cmr);
+    highp vec3 R = reflect(-l, n);
+    highp float cosAlpha = dot(E, R);
+    if (cosAlpha < 0.0) cosAlpha = 0.0;
+    else if (cosAlpha > 1.0) cosAlpha = 1.0;
+
+    gl_FragColor.rgb =
+        materialAmbientColor +
+        materialDiffuseColor * lightStrength * (cosTheta * cosTheta) / distance +
+        materialSpecularColor * lightStrength * (cosAlpha * cosAlpha * cosAlpha * cosAlpha * cosAlpha * cosAlpha * cosAlpha * cosAlpha * cosAlpha * cosAlpha) / distance;
+    gl_FragColor.a = texture2D(textureSampler, UV).a;
+    gl_FragColor.rgb = clamp(gl_FragColor.rgb, 0.0, 1.0);
+}
+