Window shows fps-count + proc-tex-shader

- added fps to window-name
- hsSDL2 needs update (as i changed functions in there which got merged)
- wrote simplistic procedural texture shader

shaders/3rdParty/noise2D.glsl

@@ -0,0 +1,70 @@
+//
+// Description : Array and textureless GLSL 2D simplex noise function.
+//      Author : Ian McEwan, Ashima Arts.
+//  Maintainer : ijm
+//     Lastmod : 20110822 (ijm)
+//     License : Copyright (C) 2011 Ashima Arts. All rights reserved.
+//               Distributed under the MIT License. See LICENSE file.
+//               https://github.com/ashima/webgl-noise
+// 
+
+vec3 mod289(vec3 x) {
+  return x - floor(x * (1.0 / 289.0)) * 289.0;
+}
+
+vec2 mod289(vec2 x) {
+  return x - floor(x * (1.0 / 289.0)) * 289.0;
+}
+
+vec3 permute(vec3 x) {
+  return mod289(((x*34.0)+1.0)*x);
+}
+
+float snoise(vec2 v)
+  {
+  const vec4 C = vec4(0.211324865405187,  // (3.0-sqrt(3.0))/6.0
+                      0.366025403784439,  // 0.5*(sqrt(3.0)-1.0)
+                     -0.577350269189626,  // -1.0 + 2.0 * C.x
+                      0.024390243902439); // 1.0 / 41.0
+// First corner
+  vec2 i  = floor(v + dot(v, C.yy) );
+  vec2 x0 = v -   i + dot(i, C.xx);
+
+// Other corners
+  vec2 i1;
+  //i1.x = step( x0.y, x0.x ); // x0.x > x0.y ? 1.0 : 0.0
+  //i1.y = 1.0 - i1.x;
+  i1 = (x0.x > x0.y) ? vec2(1.0, 0.0) : vec2(0.0, 1.0);
+  // x0 = x0 - 0.0 + 0.0 * C.xx ;
+  // x1 = x0 - i1 + 1.0 * C.xx ;
+  // x2 = x0 - 1.0 + 2.0 * C.xx ;
+  vec4 x12 = x0.xyxy + C.xxzz;
+  x12.xy -= i1;
+
+// Permutations
+  i = mod289(i); // Avoid truncation effects in permutation
+  vec3 p = permute( permute( i.y + vec3(0.0, i1.y, 1.0 ))
+		+ i.x + vec3(0.0, i1.x, 1.0 ));
+
+  vec3 m = max(0.5 - vec3(dot(x0,x0), dot(x12.xy,x12.xy), dot(x12.zw,x12.zw)), 0.0);
+  m = m*m ;
+  m = m*m ;
+
+// Gradients: 41 points uniformly over a line, mapped onto a diamond.
+// The ring size 17*17 = 289 is close to a multiple of 41 (41*7 = 287)
+
+  vec3 x = 2.0 * fract(p * C.www) - 1.0;
+  vec3 h = abs(x) - 0.5;
+  vec3 ox = floor(x + 0.5);
+  vec3 a0 = x - ox;
+
+// Normalise gradients implicitly by scaling m
+// Approximation of: m *= inversesqrt( a0*a0 + h*h );
+  m *= 1.79284291400159 - 0.85373472095314 * ( a0*a0 + h*h );
+
+// Compute final noise value at P
+  vec3 g;
+  g.x  = a0.x  * x0.x  + h.x  * x0.y;
+  g.yz = a0.yz * x12.xz + h.yz * x12.yw;
+  return 130.0 * dot(m, g);
+}

shaders/3rdParty/noise3D.glsl

@@ -0,0 +1,102 @@
+//
+// Description : Array and textureless GLSL 2D/3D/4D simplex 
+//               noise functions.
+//      Author : Ian McEwan, Ashima Arts.
+//  Maintainer : ijm
+//     Lastmod : 20110822 (ijm)
+//     License : Copyright (C) 2011 Ashima Arts. All rights reserved.
+//               Distributed under the MIT License. See LICENSE file.
+//               https://github.com/ashima/webgl-noise
+// 
+
+vec3 mod289(vec3 x) {
+  return x - floor(x * (1.0 / 289.0)) * 289.0;
+}
+
+vec4 mod289(vec4 x) {
+  return x - floor(x * (1.0 / 289.0)) * 289.0;
+}
+
+vec4 permute(vec4 x) {
+     return mod289(((x*34.0)+1.0)*x);
+}
+
+vec4 taylorInvSqrt(vec4 r)
+{
+  return 1.79284291400159 - 0.85373472095314 * r;
+}
+
+float snoise(vec3 v)
+  { 
+  const vec2  C = vec2(1.0/6.0, 1.0/3.0) ;
+  const vec4  D = vec4(0.0, 0.5, 1.0, 2.0);
+
+// First corner
+  vec3 i  = floor(v + dot(v, C.yyy) );
+  vec3 x0 =   v - i + dot(i, C.xxx) ;
+
+// Other corners
+  vec3 g = step(x0.yzx, x0.xyz);
+  vec3 l = 1.0 - g;
+  vec3 i1 = min( g.xyz, l.zxy );
+  vec3 i2 = max( g.xyz, l.zxy );
+
+  //   x0 = x0 - 0.0 + 0.0 * C.xxx;
+  //   x1 = x0 - i1  + 1.0 * C.xxx;
+  //   x2 = x0 - i2  + 2.0 * C.xxx;
+  //   x3 = x0 - 1.0 + 3.0 * C.xxx;
+  vec3 x1 = x0 - i1 + C.xxx;
+  vec3 x2 = x0 - i2 + C.yyy; // 2.0*C.x = 1/3 = C.y
+  vec3 x3 = x0 - D.yyy;      // -1.0+3.0*C.x = -0.5 = -D.y
+
+// Permutations
+  i = mod289(i); 
+  vec4 p = permute( permute( permute( 
+             i.z + vec4(0.0, i1.z, i2.z, 1.0 ))
+           + i.y + vec4(0.0, i1.y, i2.y, 1.0 )) 
+           + i.x + vec4(0.0, i1.x, i2.x, 1.0 ));
+
+// Gradients: 7x7 points over a square, mapped onto an octahedron.
+// The ring size 17*17 = 289 is close to a multiple of 49 (49*6 = 294)
+  float n_ = 0.142857142857; // 1.0/7.0
+  vec3  ns = n_ * D.wyz - D.xzx;
+
+  vec4 j = p - 49.0 * floor(p * ns.z * ns.z);  //  mod(p,7*7)
+
+  vec4 x_ = floor(j * ns.z);
+  vec4 y_ = floor(j - 7.0 * x_ );    // mod(j,N)
+
+  vec4 x = x_ *ns.x + ns.yyyy;
+  vec4 y = y_ *ns.x + ns.yyyy;
+  vec4 h = 1.0 - abs(x) - abs(y);
+
+  vec4 b0 = vec4( x.xy, y.xy );
+  vec4 b1 = vec4( x.zw, y.zw );
+
+  //vec4 s0 = vec4(lessThan(b0,0.0))*2.0 - 1.0;
+  //vec4 s1 = vec4(lessThan(b1,0.0))*2.0 - 1.0;
+  vec4 s0 = floor(b0)*2.0 + 1.0;
+  vec4 s1 = floor(b1)*2.0 + 1.0;
+  vec4 sh = -step(h, vec4(0.0));
+
+  vec4 a0 = b0.xzyw + s0.xzyw*sh.xxyy ;
+  vec4 a1 = b1.xzyw + s1.xzyw*sh.zzww ;
+
+  vec3 p0 = vec3(a0.xy,h.x);
+  vec3 p1 = vec3(a0.zw,h.y);
+  vec3 p2 = vec3(a1.xy,h.z);
+  vec3 p3 = vec3(a1.zw,h.w);
+
+//Normalise gradients
+  vec4 norm = taylorInvSqrt(vec4(dot(p0,p0), dot(p1,p1), dot(p2, p2), dot(p3,p3)));
+  p0 *= norm.x;
+  p1 *= norm.y;
+  p2 *= norm.z;
+  p3 *= norm.w;
+
+// Mix final noise value
+  vec4 m = max(0.6 - vec4(dot(x0,x0), dot(x1,x1), dot(x2,x2), dot(x3,x3)), 0.0);
+  m = m * m;
+  return 42.0 * dot( m*m, vec4( dot(p0,x0), dot(p1,x1), 
+                                dot(p2,x2), dot(p3,x3) ) );
+  }

shaders/3rdParty/noise4D.glsl

@@ -0,0 +1,128 @@
+//
+// Description : Array and textureless GLSL 2D/3D/4D simplex 
+//               noise functions.
+//      Author : Ian McEwan, Ashima Arts.
+//  Maintainer : ijm
+//     Lastmod : 20110822 (ijm)
+//     License : Copyright (C) 2011 Ashima Arts. All rights reserved.
+//               Distributed under the MIT License. See LICENSE file.
+//               https://github.com/ashima/webgl-noise
+// 
+
+vec4 mod289(vec4 x) {
+  return x - floor(x * (1.0 / 289.0)) * 289.0; }
+
+float mod289(float x) {
+  return x - floor(x * (1.0 / 289.0)) * 289.0; }
+
+vec4 permute(vec4 x) {
+     return mod289(((x*34.0)+1.0)*x);
+}
+
+float permute(float x) {
+     return mod289(((x*34.0)+1.0)*x);
+}
+
+vec4 taylorInvSqrt(vec4 r)
+{
+  return 1.79284291400159 - 0.85373472095314 * r;
+}
+
+float taylorInvSqrt(float r)
+{
+  return 1.79284291400159 - 0.85373472095314 * r;
+}
+
+vec4 grad4(float j, vec4 ip)
+  {
+  const vec4 ones = vec4(1.0, 1.0, 1.0, -1.0);
+  vec4 p,s;
+
+  p.xyz = floor( fract (vec3(j) * ip.xyz) * 7.0) * ip.z - 1.0;
+  p.w = 1.5 - dot(abs(p.xyz), ones.xyz);
+  s = vec4(lessThan(p, vec4(0.0)));
+  p.xyz = p.xyz + (s.xyz*2.0 - 1.0) * s.www; 
+
+  return p;
+  }
+						
+// (sqrt(5) - 1)/4 = F4, used once below
+#define F4 0.309016994374947451
+
+float snoise(vec4 v)
+  {
+  const vec4  C = vec4( 0.138196601125011,  // (5 - sqrt(5))/20  G4
+                        0.276393202250021,  // 2 * G4
+                        0.414589803375032,  // 3 * G4
+                       -0.447213595499958); // -1 + 4 * G4
+
+// First corner
+  vec4 i  = floor(v + dot(v, vec4(F4)) );
+  vec4 x0 = v -   i + dot(i, C.xxxx);
+
+// Other corners
+
+// Rank sorting originally contributed by Bill Licea-Kane, AMD (formerly ATI)
+  vec4 i0;
+  vec3 isX = step( x0.yzw, x0.xxx );
+  vec3 isYZ = step( x0.zww, x0.yyz );
+//  i0.x = dot( isX, vec3( 1.0 ) );
+  i0.x = isX.x + isX.y + isX.z;
+  i0.yzw = 1.0 - isX;
+//  i0.y += dot( isYZ.xy, vec2( 1.0 ) );
+  i0.y += isYZ.x + isYZ.y;
+  i0.zw += 1.0 - isYZ.xy;
+  i0.z += isYZ.z;
+  i0.w += 1.0 - isYZ.z;
+
+  // i0 now contains the unique values 0,1,2,3 in each channel
+  vec4 i3 = clamp( i0, 0.0, 1.0 );
+  vec4 i2 = clamp( i0-1.0, 0.0, 1.0 );
+  vec4 i1 = clamp( i0-2.0, 0.0, 1.0 );
+
+  //  x0 = x0 - 0.0 + 0.0 * C.xxxx
+  //  x1 = x0 - i1  + 1.0 * C.xxxx
+  //  x2 = x0 - i2  + 2.0 * C.xxxx
+  //  x3 = x0 - i3  + 3.0 * C.xxxx
+  //  x4 = x0 - 1.0 + 4.0 * C.xxxx
+  vec4 x1 = x0 - i1 + C.xxxx;
+  vec4 x2 = x0 - i2 + C.yyyy;
+  vec4 x3 = x0 - i3 + C.zzzz;
+  vec4 x4 = x0 + C.wwww;
+
+// Permutations
+  i = mod289(i); 
+  float j0 = permute( permute( permute( permute(i.w) + i.z) + i.y) + i.x);
+  vec4 j1 = permute( permute( permute( permute (
+             i.w + vec4(i1.w, i2.w, i3.w, 1.0 ))
+           + i.z + vec4(i1.z, i2.z, i3.z, 1.0 ))
+           + i.y + vec4(i1.y, i2.y, i3.y, 1.0 ))
+           + i.x + vec4(i1.x, i2.x, i3.x, 1.0 ));
+
+// Gradients: 7x7x6 points over a cube, mapped onto a 4-cross polytope
+// 7*7*6 = 294, which is close to the ring size 17*17 = 289.
+  vec4 ip = vec4(1.0/294.0, 1.0/49.0, 1.0/7.0, 0.0) ;
+
+  vec4 p0 = grad4(j0,   ip);
+  vec4 p1 = grad4(j1.x, ip);
+  vec4 p2 = grad4(j1.y, ip);
+  vec4 p3 = grad4(j1.z, ip);
+  vec4 p4 = grad4(j1.w, ip);
+
+// Normalise gradients
+  vec4 norm = taylorInvSqrt(vec4(dot(p0,p0), dot(p1,p1), dot(p2, p2), dot(p3,p3)));
+  p0 *= norm.x;
+  p1 *= norm.y;
+  p2 *= norm.z;
+  p3 *= norm.w;
+  p4 *= taylorInvSqrt(dot(p4,p4));
+
+// Mix contributions from the five corners
+  vec3 m0 = max(0.6 - vec3(dot(x0,x0), dot(x1,x1), dot(x2,x2)), 0.0);
+  vec2 m1 = max(0.6 - vec2(dot(x3,x3), dot(x4,x4)            ), 0.0);
+  m0 = m0 * m0;
+  m1 = m1 * m1;
+  return 49.0 * ( dot(m0*m0, vec3( dot( p0, x0 ), dot( p1, x1 ), dot( p2, x2 )))
+               + dot(m1*m1, vec2( dot( p3, x3 ), dot( p4, x4 ) ) ) ) ;
+
+  }

shaders/fragment.shader

@@ -1,6 +1,103 @@
 #version 400
 
+//#include "3rdParty/noise.glsl"
+
+vec3 mod289(vec3 x) {
+  return x - floor(x * (1.0 / 289.0)) * 289.0;
+}
+
+vec4 mod289(vec4 x) {
+  return x - floor(x * (1.0 / 289.0)) * 289.0;
+}
+
+vec4 permute(vec4 x) {
+     return mod289(((x*34.0)+1.0)*x);
+}
+
+vec4 taylorInvSqrt(vec4 r)
+{
+  return 1.79284291400159 - 0.85373472095314 * r;
+}
+
+float snoise(vec3 v)
+  { 
+  const vec2  C = vec2(1.0/6.0, 1.0/3.0) ;
+  const vec4  D = vec4(0.0, 0.5, 1.0, 2.0);
+
+// First corner
+  vec3 i  = floor(v + dot(v, C.yyy) );
+  vec3 x0 =   v - i + dot(i, C.xxx) ;
+
+// Other corners
+  vec3 g = step(x0.yzx, x0.xyz);
+  vec3 l = 1.0 - g;
+  vec3 i1 = min( g.xyz, l.zxy );
+  vec3 i2 = max( g.xyz, l.zxy );
+
+  //   x0 = x0 - 0.0 + 0.0 * C.xxx;
+  //   x1 = x0 - i1  + 1.0 * C.xxx;
+  //   x2 = x0 - i2  + 2.0 * C.xxx;
+  //   x3 = x0 - 1.0 + 3.0 * C.xxx;
+  vec3 x1 = x0 - i1 + C.xxx;
+  vec3 x2 = x0 - i2 + C.yyy; // 2.0*C.x = 1/3 = C.y
+  vec3 x3 = x0 - D.yyy;      // -1.0+3.0*C.x = -0.5 = -D.y
+
+// Permutations
+  i = mod289(i); 
+  vec4 p = permute( permute( permute( 
+             i.z + vec4(0.0, i1.z, i2.z, 1.0 ))
+           + i.y + vec4(0.0, i1.y, i2.y, 1.0 )) 
+           + i.x + vec4(0.0, i1.x, i2.x, 1.0 ));
+
+// Gradients: 7x7 points over a square, mapped onto an octahedron.
+// The ring size 17*17 = 289 is close to a multiple of 49 (49*6 = 294)
+  float n_ = 0.142857142857; // 1.0/7.0
+  vec3  ns = n_ * D.wyz - D.xzx;
+
+  vec4 j = p - 49.0 * floor(p * ns.z * ns.z);  //  mod(p,7*7)
+
+  vec4 x_ = floor(j * ns.z);
+  vec4 y_ = floor(j - 7.0 * x_ );    // mod(j,N)
+
+  vec4 x = x_ *ns.x + ns.yyyy;
+  vec4 y = y_ *ns.x + ns.yyyy;
+  vec4 h = 1.0 - abs(x) - abs(y);
+
+  vec4 b0 = vec4( x.xy, y.xy );
+  vec4 b1 = vec4( x.zw, y.zw );
+
+  //vec4 s0 = vec4(lessThan(b0,0.0))*2.0 - 1.0;
+  //vec4 s1 = vec4(lessThan(b1,0.0))*2.0 - 1.0;
+  vec4 s0 = floor(b0)*2.0 + 1.0;
+  vec4 s1 = floor(b1)*2.0 + 1.0;
+  vec4 sh = -step(h, vec4(0.0));
+
+  vec4 a0 = b0.xzyw + s0.xzyw*sh.xxyy ;
+  vec4 a1 = b1.xzyw + s1.xzyw*sh.zzww ;
+
+  vec3 p0 = vec3(a0.xy,h.x);
+  vec3 p1 = vec3(a0.zw,h.y);
+  vec3 p2 = vec3(a1.xy,h.z);
+  vec3 p3 = vec3(a1.zw,h.w);
+
+//Normalise gradients
+  vec4 norm = taylorInvSqrt(vec4(dot(p0,p0), dot(p1,p1), dot(p2, p2), dot(p3,p3)));
+  p0 *= norm.x;
+  p1 *= norm.y;
+  p2 *= norm.z;
+  p3 *= norm.w;
+
+// Mix final noise value
+  vec4 m = max(0.6 - vec4(dot(x0,x0), dot(x1,x1), dot(x2,x2), dot(x3,x3)), 0.0);
+  m = m * m;
+  return 42.0 * dot( m*m, vec4( dot(p0,x0), dot(p1,x1), 
+                                dot(p2,x2), dot(p3,x3) ) );
+  }
+
+
 smooth in vec3 teNormal;
+smooth in vec3 tePosition;
+smooth in float gmix;
 in vec4 teColor;
 
 out vec4 fgColor;
@@ -18,6 +115,31 @@ void main(void)
     float costheta = dot(teNormal, lightDir);
     float a = costheta * 0.5 + 0.5;
 
+    //create gravel-texel
+    vec3 uvw = tePosition;
+    // Six components of noise in a fractal sum
+    //float n = snoise(uvw * 10);
+    float n = 0;
+    n += 0.5 * snoise(uvw * 20.0);
+    //n += 0.25 * snoise(uvw * 40.0);
+    //n += 0.125 * snoise(uvw * 80.0);
+    //n += 0.0625 * snoise(uvw * 160.0);
+    //n += 0.03125 * snoise(uvw * 320.0);
+    n = abs(n*2);//[0,1]
 
-    fgColor = teColor * mix(dark, light, a);
+    //dirt
+    float d = snoise(uvw);
+    d += 0.5 * snoise(uvw * 2);
+    d += 0.25 * snoise(uvw * 4);
+    d = d/3*2 +0.5;
+
+    //                  base, dirt, noise-level*(above 0?)*(linear blend by y)
+    vec4 texBase = mix(teColor, vec4(0.45,0.27,0.1,1),d*d*step(0.01,tePosition.y)*clamp(tePosition.y/2,0,2));
+    //                  stone highlights
+    vec4 texHighlights = mix(texBase, vec4(0.9*n,0.9*n,0.9*n,1),n*n*n);
+    //mix highlights into Color with inclination, if inclination^2 > 0.35
+    vec4 texColor = mix(texBase,texHighlights, (gmix*(1-gmix))*4*(gmix*(1-gmix))*4);
+    vec4 Color = texColor;
+
+    fgColor = Color * mix(dark, light, a);
 }

shaders/tessEval.shader

@@ -4,9 +4,10 @@ layout(triangles, equal_spacing, cw) in;
 in vec3 tcPosition[];
 in vec4 tcColor[];
 in vec3 tcNormal[];
-//out vec3 tePosition;
+out vec3 tePosition;
 out vec4 teColor;
 smooth out vec3 teNormal;
+smooth out float gmix; //mixture of gravel
 //out vec3 tePatchDistance;
 //constant projection matrix
 uniform mat4 ProjectionMatrix;
@@ -15,28 +16,34 @@ uniform mat3 NormalMatrix;
 
 void main()
 {
-    vec3 p0 = gl_TessCoord.x * tcPosition[0];
+    //NORMAL
-    vec3 p1 = gl_TessCoord.y * tcPosition[1];
-    vec3 p2 = gl_TessCoord.z * tcPosition[2];
-    //tePatchDistance = gl_TessCoord;
-    vec3 tePosition = p0 + p1 + p2;
-
     vec3 n0 = gl_TessCoord.x * tcNormal[0];
     vec3 n1 = gl_TessCoord.y * tcNormal[1];
     vec3 n2 = gl_TessCoord.z * tcNormal[2];
     vec3 tessNormal = normalize(n0 + n1 + n2);
     teNormal = NormalMatrix * tessNormal;
 
+    //POSITION
+    vec3 p0 = gl_TessCoord.x * tcPosition[0];
+    vec3 p1 = gl_TessCoord.y * tcPosition[1];
+    vec3 p2 = gl_TessCoord.z * tcPosition[2];
+    tePosition = p0 + p1 + p2;
+
     //sin(a,b) = length(cross(a,b))
     float i0 = (1-gl_TessCoord.x)*gl_TessCoord.x * length(cross(tcNormal[0],tessNormal));
     float i1 = (1-gl_TessCoord.y)*gl_TessCoord.y * length(cross(tcNormal[1],tessNormal));
     float i2 = (1-gl_TessCoord.z)*gl_TessCoord.z * length(cross(tcNormal[2],tessNormal));
     float standout = i0+i1+i2;
+    tePosition = tePosition+tessNormal*standout;
+    gl_Position = ProjectionMatrix * ViewMatrix * vec4(tePosition, 1);
 
-    vec4 c0 = gl_TessCoord.x * tcColor[0];
+    //COLOR-BLENDING
-    vec4 c1 = gl_TessCoord.y * tcColor[1];
+    vec4 c0 = sqrt(gl_TessCoord.x) * tcColor[0];
-    vec4 c2 = gl_TessCoord.z * tcColor[2];
+    vec4 c1 = sqrt(gl_TessCoord.y) * tcColor[1];
-    teColor = c0 + c1 + c2;
+    vec4 c2 = sqrt(gl_TessCoord.z) * tcColor[2];
+    teColor = (c0 + c1 + c2)/(sqrt(gl_TessCoord.x)+sqrt(gl_TessCoord.y)+sqrt(gl_TessCoord.z));
+
+    //mix gravel based on incline (sin (normal,up))
+    gmix = length(cross(tessNormal, vec3(0,1,0)));
 
-    gl_Position = ProjectionMatrix * ViewMatrix * vec4(tePosition+tessNormal*standout, 1);
 }

src/Main.hs

@@ -315,6 +315,8 @@ run = do
     mt <- liftIO $ do
         now <- getCurrentTime
         diff <- return $ diffUTCTime now (stateClock state) -- get time-diffs
+        title <- return $ unwords ["Pioneers @ ",show $ ((round .fromRational.toRational $ 1/diff)::Int),"fps"]
+        setWindowTitle win $ title
         sleepAmount <- return $ floor (max 0 (0.04 - diff))*1000000 -- get time until next frame in microseconds
         threadDelay sleepAmount
         return now
@@ -447,5 +449,4 @@ processEvent e = do
                             }
                 Quit -> modify $ \s -> s {stateWinClose = True}
                 -- there is more (joystic, touchInterface, ...), but currently ignored
-                _ -> return ()
+                _ ->  liftIO $ putStrLn $ unwords ["Not processing Event:",(show e)]
-        liftIO $ putStrLn $ unwords ["Processing Event:",(show e)]

src/Render/Misc.hs

@@ -1,10 +1,8 @@
+{-# LANGUAGE ForeignFunctionInterface #-}
 module Render.Misc where
 
 import           Control.Monad
 import qualified Data.ByteString                            as B (ByteString)
-import           Foreign.Marshal.Array                      (allocaArray,
-                                                             pokeArray)
-import Foreign.C (CFloat)
 import           Graphics.Rendering.OpenGL.GL.Shaders
 import           Graphics.Rendering.OpenGL.GL.StateVar
 import           Graphics.Rendering.OpenGL.GL.StringQueries
@@ -12,7 +10,7 @@ import           Graphics.Rendering.OpenGL.GLU.Errors
 import           Graphics.Rendering.OpenGL.Raw.Core31
 import           System.IO                                  (hPutStrLn, stderr)
 import Linear
-
+import Foreign.C (CFloat)
 
 up :: V3 CFloat
 up = V3 0 1 0