diff --git a/src/mol-gl/shader/chunks/assign-size.glsl b/src/mol-gl/shader/chunks/assign-size.glsl
new file mode 100644
index 0000000000000000000000000000000000000000..e40ee951b73b880027b85cbcf379658f679912bb
--- /dev/null
+++ b/src/mol-gl/shader/chunks/assign-size.glsl
@@ -0,0 +1,11 @@
+#if defined(dSizeType_uniform)
+ float size = uSize;
+#elif defined(dSizeType_attribute)
+ float size = aSize;
+#elif defined(dSizeType_instance)
+ float size = readFromTexture(tSize, aInstance, uSizeTexDim).r;
+#elif defined(dSizeType_group)
+ float size = readFromTexture(tSize, aGroup, uSizeTexDim).r;
+#elif defined(dSizeType_groupInstance)
+ float size = readFromTexture(tSize, aInstance * float(uGroupCount) + aGroup, uSizeTexDim).r;
+#endif
\ No newline at end of file
diff --git a/src/mol-gl/shader/chunks/common.glsl b/src/mol-gl/shader/chunks/common.glsl
index cea7b801c7dbecfd57c393de02fed6023156ffbb..df1d23ec50a5030754fe5b0c4bff967ec800ad43 100644
--- a/src/mol-gl/shader/chunks/common.glsl
+++ b/src/mol-gl/shader/chunks/common.glsl
@@ -1,2 +1,32 @@
float intDiv(float a, float b) { return float(int(a) / int(b)); }
-float intMod(float a, float b) { return a - b * float(int(a) / int(b)); }
\ No newline at end of file
+float intMod(float a, float b) { return a - b * float(int(a) / int(b)); }
+
+#if __VERSION__ != 300
+ float transpose(const in float m) {
+ return m;
+ }
+
+ mat2 transpose(const in mat2 m) {
+ return mat2(
+ m[0][0], m[1][0],
+ m[0][1], m[1][1]
+ );
+ }
+
+ mat3 transpose(const in mat3 m) {
+ return mat3(
+ m[0][0], m[1][0], m[2][0],
+ m[0][1], m[1][1], m[2][1],
+ m[0][2], m[1][2], m[2][2]
+ );
+ }
+
+ mat4 transpose(const in mat4 m) {
+ return mat4(
+ m[0][0], m[1][0], m[2][0], m[3][0],
+ m[0][1], m[1][1], m[2][1], m[3][1],
+ m[0][2], m[1][2], m[2][2], m[3][2],
+ m[0][3], m[1][3], m[2][3], m[3][3]
+ );
+ }
+#endif
\ No newline at end of file
diff --git a/src/mol-gl/shader/chunks/size-vert-params.glsl b/src/mol-gl/shader/chunks/size-vert-params.glsl
new file mode 100644
index 0000000000000000000000000000000000000000..763815b671a32fc5ce457d6185708fe694a82243
--- /dev/null
+++ b/src/mol-gl/shader/chunks/size-vert-params.glsl
@@ -0,0 +1,8 @@
+#if defined(dSizeType_uniform)
+ uniform float uSize;
+#elif defined(dSizeType_attribute)
+ attribute float aSize;
+#elif defined(dSizeType_instance) || defined(dSizeType_group) || defined(dSizeType_groupInstance)
+ uniform vec2 uSizeTexDim;
+ uniform sampler2D tSize;
+#endif
\ No newline at end of file
diff --git a/src/mol-gl/shader/mesh.vert b/src/mol-gl/shader/mesh.vert
index b3f1a943085fda68654f05d072db68d6bc803577..02a93045cc5a38b0f0b952f893233c0f28d4d755 100644
--- a/src/mol-gl/shader/mesh.vert
+++ b/src/mol-gl/shader/mesh.vert
@@ -21,7 +21,6 @@ attribute float aGroup;
#endif
#pragma glslify: inverse = require(./utils/inverse.glsl)
-#pragma glslify: transpose = require(./utils/transpose.glsl)
void main(){
#pragma glslify: import('./chunks/assign-color-varying.glsl')
diff --git a/src/mol-gl/shader/points.vert b/src/mol-gl/shader/points.vert
index 5340044c2adb4d2545c15e6d67ff506da6f58543..2504f1733fcad10f9d2c37e82bd0154dbac4afc7 100644
--- a/src/mol-gl/shader/points.vert
+++ b/src/mol-gl/shader/points.vert
@@ -9,20 +9,11 @@ precision highp int;
#pragma glslify: import('./chunks/common-vert-params.glsl')
#pragma glslify: import('./chunks/color-vert-params.glsl')
+#pragma glslify: import('./chunks/size-vert-params.glsl')
uniform float uPixelRatio;
uniform float uViewportHeight;
-#if defined(dSizeType_uniform)
- uniform float uSize;
-#elif defined(dSizeType_attribute)
- attribute float aSize;
-#elif defined(dSizeType_instance) || defined(dSizeType_group) || defined(dSizeType_groupInstance)
- varying vec4 vSize;
- uniform vec2 uSizeTexDim;
- uniform sampler2D tSize;
-#endif
-
attribute vec3 aPosition;
attribute mat4 aTransform;
attribute float aInstance;
@@ -31,18 +22,7 @@ attribute float aGroup;
void main(){
#pragma glslify: import('./chunks/assign-color-varying.glsl')
#pragma glslify: import('./chunks/assign-position.glsl')
-
- #if defined(dSizeType_uniform)
- float size = uSize;
- #elif defined(dSizeType_attribute)
- float size = aSize;
- #elif defined(dSizeType_instance)
- float size = readFromTexture(tSize, aInstance, uSizeTexDim).r;
- #elif defined(dSizeType_group)
- float size = readFromTexture(tSize, aGroup, uSizeTexDim).r;
- #elif defined(dSizeType_groupInstance)
- float size = readFromTexture(tSize, aInstance * float(uGroupCount) + aGroup, uSizeTexDim).r;
- #endif
+ #pragma glslify: import('./chunks/assign-size.glsl')
#ifdef dPointSizeAttenuation
gl_PointSize = size * uPixelRatio * ((uViewportHeight / 2.0) / -mvPosition.z) * 5.0;
diff --git a/src/mol-gl/shader/utils/matrix-scale.glsl b/src/mol-gl/shader/utils/matrix-scale.glsl
new file mode 100644
index 0000000000000000000000000000000000000000..ee47bab5bffcb2488cb8a4617c8f61252f86d632
--- /dev/null
+++ b/src/mol-gl/shader/utils/matrix-scale.glsl
@@ -0,0 +1,12 @@
+/**
+ * Copyright (c) 2019 mol* contributors, licensed under MIT, See LICENSE file for more info.
+ *
+ * @author Alexander Rose <alexander.rose@weirdbyte.de>
+ */
+
+float matrixScale(in mat4 m){
+ vec4 r = m[0];
+ return sqrt(r[0] * r[0] + r[1] * r[1] + r[2] * r[2]);
+}
+
+#pragma glslify: export(matrixScale)
\ No newline at end of file
diff --git a/src/mol-gl/shader/utils/transpose.glsl b/src/mol-gl/shader/utils/transpose.glsl
deleted file mode 100644
index 5a2a3b7147791d8752f04e92288a8047f0323898..0000000000000000000000000000000000000000
--- a/src/mol-gl/shader/utils/transpose.glsl
+++ /dev/null
@@ -1,26 +0,0 @@
-// (c) 2014 Mikola Lysenko. MIT License
-// https://github.com/glslify/glsl-transpose
-
-float transpose(const in float m) {
- return m;
-}
-
-mat2 transpose(const in mat2 m) {
- return mat2(m[0][0], m[1][0],
- m[0][1], m[1][1]);
-}
-
-mat3 transpose(const in mat3 m) {
- return mat3(m[0][0], m[1][0], m[2][0],
- m[0][1], m[1][1], m[2][1],
- m[0][2], m[1][2], m[2][2]);
-}
-
-mat4 transpose(const in mat4 m) {
- return mat4(m[0][0], m[1][0], m[2][0], m[3][0],
- m[0][1], m[1][1], m[2][1], m[3][1],
- m[0][2], m[1][2], m[2][2], m[3][2],
- m[0][3], m[1][3], m[2][3], m[3][3]);
-}
-
-#pragma glslify: export(transpose)
\ No newline at end of file