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Feature/model shader (#1723)
* Add support for RenderableModel to take custom shader code * Added example to highlight usage
This commit is contained in:
Alexander Bock
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/*****************************************************************************************
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* *
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* OpenSpace *
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* *
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* Copyright (c) 2014-2021 *
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* *
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* Permission is hereby granted, free of charge, to any person obtaining a copy of this *
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* software and associated documentation files (the "Software"), to deal in the Software *
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* without restriction, including without limitation the rights to use, copy, modify, *
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* merge, publish, distribute, sublicense, and/or sell copies of the Software, and to *
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* permit persons to whom the Software is furnished to do so, subject to the following *
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* conditions: *
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* *
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* The above copyright notice and this permission notice shall be included in all copies *
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* or substantial portions of the Software. *
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* *
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, *
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* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A *
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* PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT *
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* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF *
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* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE *
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* OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
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****************************************************************************************/
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#include "fragment.glsl"
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in vec2 vs_st;
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in vec3 vs_normalViewSpace;
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in vec4 vs_positionCameraSpace;
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in float vs_screenSpaceDepth;
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in mat3 TBN;
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uniform float ambientIntensity = 0.2;
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uniform float diffuseIntensity = 1.0;
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uniform float specularIntensity = 1.0;
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uniform bool performShading = true;
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uniform bool use_forced_color = false;
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uniform bool has_texture_diffuse;
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uniform bool has_texture_normal;
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uniform bool has_texture_specular;
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uniform bool has_color_specular;
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uniform bool opacityBlending = false;
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uniform sampler2D texture_diffuse;
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uniform sampler2D texture_normal;
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uniform sampler2D texture_specular;
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uniform vec3 color_diffuse;
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uniform vec3 color_specular;
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uniform int nLightSources;
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uniform vec3 lightDirectionsViewSpace[8];
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uniform float lightIntensities[8];
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uniform float opacity = 1.0;
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Fragment getFragment() {
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Fragment frag;
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if (has_texture_normal) {
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vec3 normalAlbedo = texture(texture_normal, vs_st).rgb;
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normalAlbedo = normalize(normalAlbedo * 2.0 - 1.0);
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frag.color.rgb = normalize(TBN * normalAlbedo);
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}
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else {
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frag.color.rgb = normalize(vs_normalViewSpace);
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}
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frag.color.a = 1.0;
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frag.gPosition = vs_positionCameraSpace;
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frag.gNormal = vec4(vs_normalViewSpace, 0.0);
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frag.disableLDR2HDR = true;
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return frag;
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}
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@@ -0,0 +1,68 @@
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/*****************************************************************************************
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* *
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* OpenSpace *
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* *
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* Copyright (c) 2014-2021 *
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* *
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* Permission is hereby granted, free of charge, to any person obtaining a copy of this *
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* software and associated documentation files (the "Software"), to deal in the Software *
|
||||
* without restriction, including without limitation the rights to use, copy, modify, *
|
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* merge, publish, distribute, sublicense, and/or sell copies of the Software, and to *
|
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* permit persons to whom the Software is furnished to do so, subject to the following *
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* conditions: *
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* *
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* The above copyright notice and this permission notice shall be included in all copies *
|
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* or substantial portions of the Software. *
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* *
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, *
|
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* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A *
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* PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT *
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* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF *
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* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE *
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* OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
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****************************************************************************************/
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#version __CONTEXT__
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#include "PowerScaling/powerScaling_vs.hglsl"
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layout(location = 0) in vec4 in_position;
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layout(location = 1) in vec2 in_st;
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layout(location = 2) in vec3 in_normal;
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layout(location = 3) in vec3 in_tangent;
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out vec2 vs_st;
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out vec3 vs_normalViewSpace;
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out float vs_screenSpaceDepth;
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out vec4 vs_positionCameraSpace;
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out mat3 TBN;
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uniform mat4 modelViewTransform;
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uniform mat4 projectionTransform;
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uniform mat4 normalTransform;
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uniform mat4 meshTransform;
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uniform mat4 meshNormalTransform;
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void main() {
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vs_positionCameraSpace = modelViewTransform * (meshTransform * in_position);
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vec4 positionClipSpace = projectionTransform * vs_positionCameraSpace;
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vec4 positionScreenSpace = z_normalization(positionClipSpace);
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gl_Position = positionScreenSpace;
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vs_st = in_st;
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vs_screenSpaceDepth = positionScreenSpace.w;
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vs_normalViewSpace = normalize(mat3(normalTransform) * (mat3(meshNormalTransform) * in_normal));
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// TBN matrix for normal mapping
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vec3 T = normalize(mat3(normalTransform) * (mat3(meshNormalTransform) * in_tangent));
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vec3 N = normalize(mat3(normalTransform) * (mat3(meshNormalTransform) * in_normal));
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// Re-orthogonalize T with respect to N
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T = normalize(T - dot(T, N) * N);
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// Retrieve perpendicular vector B with cross product of T and N
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vec3 B = normalize(cross(N, T));
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TBN = mat3(T, B, N);
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}
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@@ -0,0 +1,45 @@
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local assetHelper = asset.require('util/asset_helper')
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local sunTransforms = asset.require('scene/solarsystem/sun/transforms')
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local transforms = asset.require('scene/solarsystem/planets/earth/transforms')
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local model = asset.syncedResource({
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Name = "Animated Box",
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Type = "HttpSynchronization",
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Identifier = "animated_box",
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Version = 1
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})
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local model = {
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Identifier = "modelshader",
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Parent = transforms.EarthCenter.Identifier,
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Transform = {
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Translation = {
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Type = "StaticTranslation",
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Position = { 11E7, 0.0, 0.0 }
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}
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},
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Renderable = {
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Type = "RenderableModel",
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GeometryFile = model .. "/BoxAnimated.glb",
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ModelScale = 3E7,
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LightSources = {
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{
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Type = "SceneGraphLightSource",
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Identifier = "Sun",
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Node = sunTransforms.SolarSystemBarycenter.Identifier,
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Intensity = 1.0
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}
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},
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PerformShading = true,
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DisableFaceCulling = true,
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VertexShader = asset.localResource("model_vs.glsl"),
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FragmentShader = asset.localResource("model_fs.glsl"),
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},
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GUI = {
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Name = "Model Shader",
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Path = "/Example",
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Description = "Simple box model with a custom shader",
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}
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}
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assetHelper.registerSceneGraphNodesAndExport(asset, { model })
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