generated from hertog/godot-module-template
131 lines
2.8 KiB
GLSL
131 lines
2.8 KiB
GLSL
#[vertex]
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#version 450
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#VERSION_DEFINES
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layout(location = 0) in highp vec3 vertex;
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#ifdef POSITIONAL_SHADOW
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layout(push_constant, std430) uniform Constants {
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mat2x4 modelview;
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vec4 rotation;
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vec2 direction;
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float z_far;
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uint pad;
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float z_near;
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uint cull_mode;
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float pad3;
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float pad4;
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}
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constants;
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layout(set = 0, binding = 0, std430) restrict readonly buffer OccluderTransforms {
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mat2x4 transforms[];
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}
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occluder_transforms;
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#else
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layout(push_constant, std430) uniform Constants {
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mat4 projection;
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mat2x4 modelview;
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vec2 direction;
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float z_far;
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uint cull_mode;
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}
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constants;
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#endif
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#ifdef MODE_SHADOW
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layout(location = 0) out highp float depth;
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#endif
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void main() {
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#ifdef POSITIONAL_SHADOW
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float c = -(constants.z_far + constants.z_near) / (constants.z_far - constants.z_near);
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float d = -2.0 * constants.z_far * constants.z_near / (constants.z_far - constants.z_near);
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mat4 projection = mat4(vec4(1.0, 0.0, 0.0, 0.0),
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vec4(0.0, 1.0, 0.0, 0.0),
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vec4(0.0, 0.0, c, -1.0),
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vec4(0.0, 0.0, d, 0.0));
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// Precomputed:
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// Vector3 cam_target = Basis::from_euler(Vector3(0, 0, Math_TAU * ((i + 3) / 4.0))).xform(Vector3(0, 1, 0));
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// projection = projection * Projection(Transform3D().looking_at(cam_targets[i], Vector3(0, 0, -1)).affine_inverse());
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projection *= mat4(vec4(constants.rotation.x, 0.0, constants.rotation.y, 0.0), vec4(constants.rotation.z, 0.0, constants.rotation.w, 0.0), vec4(0.0, -1.0, 0.0, 0.0), vec4(0.0, 0.0, 0.0, 1.0));
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mat4 modelview = mat4(occluder_transforms.transforms[constants.pad]) * mat4(constants.modelview);
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#else
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mat4 projection = constants.projection;
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mat4 modelview = mat4(constants.modelview[0], constants.modelview[1], vec4(0.0, 0.0, 1.0, 0.0), vec4(0.0, 0.0, 0.0, 1.0));
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#endif
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highp vec4 vtx = vec4(vertex, 1.0) * modelview;
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#ifdef MODE_SHADOW
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depth = dot(constants.direction, vtx.xy);
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#endif
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gl_Position = projection * vtx;
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}
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#[fragment]
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#version 450
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#VERSION_DEFINES
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#ifdef POSITIONAL_SHADOW
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layout(push_constant, std430) uniform Constants {
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mat2x4 modelview;
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vec4 rotation;
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vec2 direction;
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float z_far;
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uint pad;
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float z_near;
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uint cull_mode;
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float pad3;
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float pad4;
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}
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constants;
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#else
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layout(push_constant, std430) uniform Constants {
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mat4 projection;
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mat2x4 modelview;
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vec2 direction;
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float z_far;
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uint cull_mode;
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}
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constants;
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#endif
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#ifdef MODE_SHADOW
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layout(location = 0) in highp float depth;
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layout(location = 0) out highp float distance_buf;
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#else
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layout(location = 0) out highp float sdf_buf;
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#endif
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#define POLYGON_CULL_DISABLED 0
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#define POLYGON_CULL_FRONT 1
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#define POLYGON_CULL_BACK 2
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void main() {
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#ifdef MODE_SHADOW
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bool front_facing = gl_FrontFacing;
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if (constants.cull_mode == POLYGON_CULL_BACK && !front_facing) {
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discard;
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} else if (constants.cull_mode == POLYGON_CULL_FRONT && front_facing) {
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discard;
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}
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distance_buf = depth / constants.z_far;
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#else
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sdf_buf = 1.0;
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#endif
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}
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