diff options
Diffstat (limited to 'src/datavisualization/engine/shaders/ambient.frag')
-rw-r--r-- | src/datavisualization/engine/shaders/ambient.frag | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/src/datavisualization/engine/shaders/ambient.frag b/src/datavisualization/engine/shaders/ambient.frag new file mode 100644 index 00000000..88f850f3 --- /dev/null +++ b/src/datavisualization/engine/shaders/ambient.frag @@ -0,0 +1,32 @@ +#version 120 + +uniform highp vec3 lightPosition_wrld; +uniform highp vec3 color_mdl; + +varying highp vec3 position_wrld; +varying highp vec3 normal_cmr; +varying highp vec3 eyeDirection_cmr; +varying highp vec3 lightDirection_cmr; + +void main() { + highp vec3 lightColor = vec3(1.0, 1.0, 1.0); + highp float lightPower = 10.0; + highp vec3 materialAmbientColor = vec3(0.5, 0.5, 0.5) * color_mdl; + highp vec3 materialSpecularColor = vec3(0.3, 0.3, 0.3) * color_mdl; + + 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 = + materialAmbientColor + + materialSpecularColor * lightColor * lightPower * pow(cosAlpha, 5) / (distance * distance); + gl_FragColor.a = 1.0; +} + |