Finally first visible surface.

Change-Id: Ib168cbb8cd636539aee62098b98e6e24a112dab6
Reviewed-by: Mika Salmela <mika.salmela@digia.com>

1 files changed, 38 insertions, 0 deletions

diff --git a/src/datavis3d/engine/shaders/surfaceFlat.frag b/src/datavis3d/engine/shaders/surfaceFlat.frag
new file mode 100644
index 00000000..b07acbad
--- /dev/null
+++ b/src/datavis3d/engine/shaders/surfaceFlat.frag
@@ -0,0 +1,38 @@
+#version 150
+
+varying highp vec2 UV;
+varying highp vec3 coords_mdl;
+varying highp vec3 position_wrld;
+flat in highp vec3 normal_cmr;
+varying highp vec3 eyeDirection_cmr;
+varying highp vec3 lightDirection_cmr;
+
+uniform highp vec3 lightPosition_wrld;
+uniform highp vec3 color_mdl;
+uniform highp float lightStrength;
+uniform highp float ambientStrength;
+
+void main() {
+    highp vec3 materialDiffuseColor = vec3(position_wrld.y, 1.0 - position_wrld.y, 0.0);
+    highp vec3 materialAmbientColor = vec3(ambientStrength, ambientStrength, ambientStrength) * materialDiffuseColor;
+    highp vec3 materialSpecularColor = vec3(1.0, 1.0, 1.0);
+
+    highp float distance = length(lightPosition_wrld - position_wrld);
+
+    highp vec3 n = normalize(normal_cmr);
+    highp vec3 l = normalize(lightDirection_cmr);
+    highp float cosTheta = clamp(dot(n, l), 0.0, 1.0);
+
+    highp vec3 E = normalize(eyeDirection_cmr);
+    highp vec3 R = reflect(-l, n);
+    highp float cosAlpha = clamp(dot(E, R), 0.0, 1.0);
+
+//    gl_FragColor.rgb = n;
+    gl_FragColor.rgb =
+        materialAmbientColor +
+        materialDiffuseColor * lightStrength * pow(cosTheta, 2) / distance +
+        materialSpecularColor * lightStrength * pow(cosAlpha, 10) / distance;
+    gl_FragColor.a = 1.0;
+//    gl_FragColor = vec4(1.0, 0.0, 0.0, 1.0);
+}
+