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dd5901d351
Multiview shaders. Refactor Frustum management Rewrite shared shadow map cull mask should respect stereo Stereo savegame screencap LocalMap refactoring use the vertex buffer hint instead of the display list patch to enable/disable display lists Character preview fixes
80 lines
No EOL
2.4 KiB
GLSL
80 lines
No EOL
2.4 KiB
GLSL
#ifndef MULTIVIEW_VERTEX
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#define MULTIVIEW_VERTEX
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// This file either enables or disables GL_OVR_multiview related code.
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// For use in vertex shaders
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// REQUIREMENT:
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// GLSL version: 330 or greater
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// GLSL profile: compatibility
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// NOTE: If stereo is enabled using Misc::StereoView::shaderStereoDefines, version 330 compatibility (or greater) will be set.
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// USAGE:
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// To create a stereo-aware vertex shader, use the matrix accessor functions defined in this .glsl file to compute gl_Position.
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// For the vertex stage, usually only gl_Position needs to be computed with stereo awareness, while other variables such as viewPos
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// should be computed in the center camera's view space and take no stereo awareness.
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//
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// A typical gl_Position line will look like the following:
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// gl_Position = mw_stereoAwareProjectionMatrix() * (mw_stereoAwareModelViewMatrix() * gl_Vertex);
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//
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// If you need to perform intermediate computations before determining the final values of gl_Position and viewPos,
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// your code might look more like the following:
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// vec4 intermediateViewPos = gl_ModelViewMatrix * gl_Vertex;
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// vec4 viewPos = myWhateverCode(intermediateViewPos);
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// gl_Position = mw_stereoAwareProjectionMatrix() * mw_stereoAwareViewPosition(viewPos);
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//
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#if @useOVR_multiview
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#extension GL_OVR_multiview : require
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#ifndef MULTIVIEW_FRAGMENT
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// Layout cannot be used in the fragment shader
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layout(num_views = @numViews) in;
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#endif
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uniform mat4 projectionMatrixMultiView[@numViews];
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uniform mat4 viewMatrixMultiView[@numViews];
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// NOTE:
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// stereo-aware inverse view matrices and normal matrices have not been implemented.
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// Some effects like specular highlights would need stereo aware normal matrices to be 100% correct.
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// But the difference is not likely to be noticeable unless you're actively looking for it.
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mat4 mw_stereoAwareProjectionMatrix()
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{
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return projectionMatrixMultiView[gl_ViewID_OVR];
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}
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mat4 mw_stereoAwareModelViewMatrix()
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{
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return viewMatrixMultiView[gl_ViewID_OVR] * gl_ModelViewMatrix;
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}
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vec4 mw_stereoAwareViewPosition(vec4 viewPos)
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{
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return viewMatrixMultiView[gl_ViewID_OVR] * viewPos;
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}
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#else // useOVR_multiview
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uniform mat4 projectionMatrix;
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mat4 mw_stereoAwareProjectionMatrix()
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{
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return projectionMatrix;
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}
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mat4 mw_stereoAwareModelViewMatrix()
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{
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return gl_ModelViewMatrix;
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}
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vec4 mw_stereoAwareViewPosition(vec4 viewPos)
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{
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return viewPos;
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}
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#endif // useOVR_multiview
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#endif // MULTIVIEW_VERTEX |