diff options
Diffstat (limited to 'Shaders')
| -rw-r--r-- | Shaders/ray_march.cginc | 93 |
1 files changed, 74 insertions, 19 deletions
diff --git a/Shaders/ray_march.cginc b/Shaders/ray_march.cginc index 850a393..0fd5c78 100644 --- a/Shaders/ray_march.cginc +++ b/Shaders/ray_march.cginc @@ -38,6 +38,31 @@ float get_phase_fraction(float r, float nth_phase, float n_phases) { return r0 / stride; } +// d = base edge length +// h = height +// e = frame thickness +// Pyramid base is on xy plane. +float distance_from_rect_pyramid_frame(float3 p, float dx, float dy, float h, float e, float skew) +{ + float3 p0 = float3(dx/2, dy/2, 0); + float3 p1 = float3(dx/2, -dy/2, 0); + float3 p2 = float3(-dx/2, -dy/2, 0); + float3 p3 = float3(-dx/2, dy/2, 0); + float3 p4 = float3(skew, 0, h); + + float dist = 1000; + dist = min(dist, distance_from_line_segment(p, p0, p1, e)); + dist = min(dist, distance_from_line_segment(p, p1, p2, e)); + dist = min(dist, distance_from_line_segment(p, p2, p3, e)); + dist = min(dist, distance_from_line_segment(p, p3, p0, e)); + dist = min(dist, distance_from_line_segment(p, p0, p4, e)); + dist = min(dist, distance_from_line_segment(p, p1, p4, e)); + dist = min(dist, distance_from_line_segment(p, p2, p4, e)); + dist = min(dist, distance_from_line_segment(p, p3, p4, e)); + + return dist; +} + float stt_map(float3 p, out float3 hsv, out float smoothness, out float alpha, out float2 text_uv) { hsv[0] = 0; @@ -46,25 +71,25 @@ float stt_map(float3 p, out float3 hsv, out float smoothness, out float alpha, o smoothness = 0.3; alpha = 0; - float p0r = get_phase_fraction(Ray_March_Emerge, 0, 3); - float p1r = get_phase_fraction(Ray_March_Emerge, 1, 3); - float p2r = get_phase_fraction(Ray_March_Emerge, 2, 3); - - // Use this to make the box grow out of the bottom left corner instead of the - // middle. - float3 emerge_offset = 0; + float p0r = get_phase_fraction(Ray_March_Emerge, 0, 4); + float p1r = get_phase_fraction(Ray_March_Emerge, 1, 4); + float p2r = get_phase_fraction(Ray_March_Emerge, 2, 4); + float p3r = get_phase_fraction(Ray_March_Emerge, 3, 4); float dist = 1000 * 1000 * 1000; + float3 box_scale_g = float3(1, 1, .85); + float3 box_center_g = float3(.020, 0, .0122); { float3 pp = p; - - pp.x -= 0.02; - pp.z -= 0.01; + pp -= box_center_g; float box_thck = .0002; - float3 box_sz = float3(6, .5, 3) * .003; + float3 box_sz = float3(6, .5, 3) * .003 * box_scale_g; + // Use this to make the box grow out of the bottom left corner instead of the + // middle. + float3 emerge_offset = 0; emerge_offset.x = lerp(box_sz.x, box_thck, p1r); emerge_offset.z = lerp(box_sz.z, box_thck, p2r); pp += emerge_offset; @@ -80,18 +105,21 @@ float stt_map(float3 p, out float3 hsv, out float smoothness, out float alpha, o } { float3 pp = p; + pp -= box_center_g; - pp.x -= 0.02; - pp.z -= 0.01; + float3 box_scale = float3(10, 0.1, 4.9) * .00175 * box_scale_g; + float3 box_pad = float3(.001, 0, .001); + box_scale -= box_pad; - float3 box_scale = float3(.01, .0001, .0045) * 1.6; + // Use this to make the board grow out of the left edge instead of from the + // center. + float3 emerge_offset = 0; + emerge_offset.x = lerp(box_scale.x, 0, p3r); + pp += emerge_offset; - float p3r = get_phase_fraction(Ray_March_Emerge, 3, 4); - box_scale.x *= ceil(p3r); + box_scale.x = lerp(0, box_scale.x, p3r); box_scale.y *= ceil(p3r); - box_scale.z = lerp(0, box_scale.z, p3r); - - pp += emerge_offset; + box_scale.z *= ceil(p3r); float d = distance_from_box(pp, box_scale); @@ -106,6 +134,33 @@ float stt_map(float3 p, out float3 hsv, out float smoothness, out float alpha, o hsv[2] = (d < dist) * 0 + (d >= dist) * hsv[2]; dist = min(dist, d); } + { + float3 pp = p; + + pp -= box_center_g - float3(6, 0, 3) * .003 * box_scale_g; + + float scale = .0025 + .0002; + pp.x -= scale/2; + + float edgex = 1 * scale; + float edgey = 1 * scale; + float height = -1.3 * scale; + float r = .06 * scale; + float skew = -.75 * scale; + + pp.z += lerp(0, .0008, p0r) * p0r; + r = lerp(0, r, p0r) * p0r; + edgey = lerp(0, edgey, p0r) * p0r; + + pp.x += lerp(edgex/2, 0, p1r); + edgex = lerp(0, edgex, p1r); + + height = lerp(0, height, p2r); + skew = lerp(0, skew, p3r); + + float d = distance_from_rect_pyramid_frame(pp, edgex, edgey, height, r, skew); + dist = min(dist, d); + } return dist; } |