dhader

src/main/resources/assets/malum/shaders/core/gravity_vortex.fsh

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+#version 150
+
+#moj_import <fog.glsl>
+
+const float numRings = 20.0;
+const vec2 center = vec2(0.5);
+const float spacing = 1.0 / numRings;
+const float slow = 30.0;
+const float cycleDur = 1.0;
+const float tunnelElongation = 0.25;
+
+uniform sampler2D Sampler0;
+
+uniform float GameTime;
+
+uniform vec4 ColorModulator;
+uniform float FogStart;
+uniform float FogEnd;
+uniform vec4 FogColor;
+
+in float vertexDistance;
+in vec4 vertexColor;
+in vec4 lightMapColor;
+in vec4 overlayColor;
+in vec2 texCoord0;
+in vec4 normal;
+
+out vec4 fragColor;
+
+//taken from https://www.shadertoy.com/view/ltBXRc
+float variation(vec2 v1, vec2 v2, float strength, float speed) {
+    return sin(dot(normalize(v1), normalize(v2)) * strength + GameTime * 1000 * speed) / 100.0;
+}
+
+//taken from https://www.shadertoy.com/view/ltBXRc
+vec3 paintCircle (vec2 uv, vec2 center, float rad, float width, float index) {
+    vec2 diff = center-uv;
+    float len = length(diff);
+    float scale = rad;
+    float mult = mod(index, 2.) == 0. ? 1. : -1.;
+    len += variation(diff, vec2(rad*mult, 1.0), 7.0*scale, 2.0);
+    len -= variation(diff, vec2(1.0, rad*mult), 7.0*scale, 2.0);
+    float circle = smoothstep((rad-width)*scale, (rad)*scale, len) - smoothstep((rad)*scale, (rad+width)*scale, len);
+    return vec3(circle);
+}
+
+
+vec3 paintRing(vec2 uv, vec2 center, float radius, float index){
+    vec3 color = paintCircle(uv, center, radius, 0.075, index);
+    color *= vec3(0.9,0.05,0.9);
+    color += paintCircle(uv, center, radius, 0.015, index); //White
+    return color;
+}
+
+
+void main() {
+    vec2 uv = texCoord0;
+
+    float radius = mod(1000 * GameTime/slow, cycleDur);
+    vec3 color;
+
+    float border = 0.25;
+    vec2 bl = smoothstep(0.0, border, uv);
+    vec2 tr = smoothstep(0.0, border, 1.0 - uv);
+
+    for(float i = 0.0; i < numRings; i++){
+        color += paintRing(uv, center, tunnelElongation*log(mod(radius + i * spacing, cycleDur)), i );
+        color += paintRing(uv, center, log(mod(radius + i * spacing, cycleDur)), i);
+    }
+
+    color = mix(color, vec3(0.0), distance(uv, center) * 1.95);
+
+    fragColor = vec4(color, 0.5);
+}

src/main/resources/assets/malum/shaders/core/gravity_vortex.json

@@ -0,0 +1,149 @@
+{
+  "blend": {
+    "func": "add",
+    "srcrgb": "srcalpha",
+    "dstrgb": "1-srcalpha"
+  },
+  "vertex": "lodestone:generic",
+  "fragment": "malum:gravity_vortex",
+  "attributes": [
+    "Position",
+    "Color",
+    "UV0",
+    "UV2"
+  ],
+  "samplers": [
+    {
+      "name": "Sampler0"
+    },
+    {
+      "name": "Sampler2"
+    }
+  ],
+  "uniforms": [
+    {
+      "name": "ModelViewMat",
+      "type": "matrix4x4",
+      "count": 16,
+      "values": [
+        1.0,
+        0.0,
+        0.0,
+        0.0,
+        0.0,
+        1.0,
+        0.0,
+        0.0,
+        0.0,
+        0.0,
+        1.0,
+        0.0,
+        0.0,
+        0.0,
+        0.0,
+        1.0
+      ]
+    },
+    {
+      "name": "ProjMat",
+      "type": "matrix4x4",
+      "count": 16,
+      "values": [
+        1.0,
+        0.0,
+        0.0,
+        0.0,
+        0.0,
+        1.0,
+        0.0,
+        0.0,
+        0.0,
+        0.0,
+        1.0,
+        0.0,
+        0.0,
+        0.0,
+        0.0,
+        1.0
+      ]
+    },
+    {
+      "name": "IViewRotMat",
+      "type": "matrix3x3",
+      "count": 9,
+      "values": [
+        1.0,
+        0.0,
+        0.0,
+        0.0,
+        1.0,
+        0.0,
+        0.0,
+        0.0,
+        1.0
+      ]
+    },
+    {
+      "name": "ColorModulator",
+      "type": "float",
+      "count": 4,
+      "values": [
+        1.0,
+        1.0,
+        1.0,
+        1.0
+      ]
+    },
+    {
+      "name": "FogStart",
+      "type": "float",
+      "count": 1,
+      "values": [
+        0.0
+      ]
+    },
+    {
+      "name": "FogEnd",
+      "type": "float",
+      "count": 1,
+      "values": [
+        1.0
+      ]
+    },
+    {
+      "name": "FogColor",
+      "type": "float",
+      "count": 4,
+      "values": [
+        0.0,
+        0.0,
+        0.0,
+        0.0
+      ]
+    },
+    {
+      "name": "FogShape",
+      "type": "int",
+      "count": 1,
+      "values": [
+        0
+      ]
+    },
+    {
+      "name": "GameTime",
+      "type": "float",
+      "count": 1,
+      "values": [
+        0.0
+      ]
+    },
+    {
+      "name": "LumiTransparency",
+      "type": "float",
+      "count": 1,
+      "values": [
+        0.0
+      ]
+    }
+  ]
+}