diff options
author | Enrico Turri <enricoturri@seznam.cz> | 2018-05-21 14:08:02 +0300 |
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committer | Enrico Turri <enricoturri@seznam.cz> | 2018-05-21 14:08:02 +0300 |
commit | 7cff6ef6dba33055179ab30c12016a1ab25eec99 (patch) | |
tree | f51c3bd7296605e083db0ac74a57b5d1475d6fae /resources | |
parent | 3fb96ff6368e0aa5120a74d6f919b401d2ed0a20 (diff) |
Shaders loaded from files
Diffstat (limited to 'resources')
-rw-r--r-- | resources/shaders/gouraud.fs | 18 | ||||
-rw-r--r-- | resources/shaders/gouraud.vs | 70 | ||||
-rw-r--r-- | resources/shaders/variable_layer_height.fs | 40 | ||||
-rw-r--r-- | resources/shaders/variable_layer_height.vs | 46 |
4 files changed, 174 insertions, 0 deletions
diff --git a/resources/shaders/gouraud.fs b/resources/shaders/gouraud.fs new file mode 100644 index 000000000..9edc8fa76 --- /dev/null +++ b/resources/shaders/gouraud.fs @@ -0,0 +1,18 @@ +#version 110 + +const vec3 ZERO = vec3(0.0, 0.0, 0.0); + +// x = tainted, y = specular; +varying vec2 intensity; + +varying vec3 delta_box_min; +varying vec3 delta_box_max; + +uniform vec4 uniform_color; + +void main() +{ + // if the fragment is outside the print volume -> use darker color + vec3 color = (any(lessThan(delta_box_min, ZERO)) || any(greaterThan(delta_box_max, ZERO))) ? mix(uniform_color.rgb, ZERO, 0.3333) : uniform_color.rgb; + gl_FragColor = vec4(vec3(intensity.y, intensity.y, intensity.y) + color * intensity.x, uniform_color.a); +} diff --git a/resources/shaders/gouraud.vs b/resources/shaders/gouraud.vs new file mode 100644 index 000000000..22ba91a93 --- /dev/null +++ b/resources/shaders/gouraud.vs @@ -0,0 +1,70 @@ +#version 110 + +#define INTENSITY_CORRECTION 0.6 + +// normalized values for (-0.6/1.31, 0.6/1.31, 1./1.31) +const vec3 LIGHT_TOP_DIR = vec3(-0.4574957, 0.4574957, 0.7624929); +#define LIGHT_TOP_DIFFUSE (0.8 * INTENSITY_CORRECTION) +#define LIGHT_TOP_SPECULAR (0.125 * INTENSITY_CORRECTION) +#define LIGHT_TOP_SHININESS 20.0 + +// normalized values for (1./1.43, 0.2/1.43, 1./1.43) +const vec3 LIGHT_FRONT_DIR = vec3(0.6985074, 0.1397015, 0.6985074); +#define LIGHT_FRONT_DIFFUSE (0.3 * INTENSITY_CORRECTION) +//#define LIGHT_FRONT_SPECULAR (0.0 * INTENSITY_CORRECTION) +//#define LIGHT_FRONT_SHININESS 5.0 + +#define INTENSITY_AMBIENT 0.3 + +const vec3 ZERO = vec3(0.0, 0.0, 0.0); + +struct PrintBoxDetection +{ + vec3 min; + vec3 max; + // xyz contains the offset, if w == 1.0 detection needs to be performed + vec4 volume_origin; +}; + +uniform PrintBoxDetection print_box; + +// x = tainted, y = specular; +varying vec2 intensity; + +varying vec3 delta_box_min; +varying vec3 delta_box_max; + +void main() +{ + // First transform the normal into camera space and normalize the result. + vec3 normal = normalize(gl_NormalMatrix * gl_Normal); + + // Compute the cos of the angle between the normal and lights direction. The light is directional so the direction is constant for every vertex. + // Since these two are normalized the cosine is the dot product. We also need to clamp the result to the [0,1] range. + float NdotL = max(dot(normal, LIGHT_TOP_DIR), 0.0); + + intensity.x = INTENSITY_AMBIENT + NdotL * LIGHT_TOP_DIFFUSE; + intensity.y = 0.0; + + if (NdotL > 0.0) + intensity.y += LIGHT_TOP_SPECULAR * pow(max(dot(normal, reflect(-LIGHT_TOP_DIR, normal)), 0.0), LIGHT_TOP_SHININESS); + + // Perform the same lighting calculation for the 2nd light source (no specular applied). + NdotL = max(dot(normal, LIGHT_FRONT_DIR), 0.0); + intensity.x += NdotL * LIGHT_FRONT_DIFFUSE; + + // compute deltas for out of print volume detection (world coordinates) + if (print_box.volume_origin.w == 1.0) + { + vec3 v = gl_Vertex.xyz + print_box.volume_origin.xyz; + delta_box_min = v - print_box.min; + delta_box_max = v - print_box.max; + } + else + { + delta_box_min = ZERO; + delta_box_max = ZERO; + } + + gl_Position = ftransform(); +} diff --git a/resources/shaders/variable_layer_height.fs b/resources/shaders/variable_layer_height.fs new file mode 100644 index 000000000..f87e6627e --- /dev/null +++ b/resources/shaders/variable_layer_height.fs @@ -0,0 +1,40 @@ +#version 110 + +#define M_PI 3.1415926535897932384626433832795 + +// 2D texture (1D texture split by the rows) of color along the object Z axis. +uniform sampler2D z_texture; +// Scaling from the Z texture rows coordinate to the normalized texture row coordinate. +uniform float z_to_texture_row; +uniform float z_texture_row_to_normalized; +uniform float z_cursor; +uniform float z_cursor_band_width; + +// x = tainted, y = specular; +varying vec2 intensity; + +varying float object_z; + +void main() +{ + float object_z_row = z_to_texture_row * object_z; + // Index of the row in the texture. + float z_texture_row = floor(object_z_row); + // Normalized coordinate from 0. to 1. + float z_texture_col = object_z_row - z_texture_row; + float z_blend = 0.25 * cos(min(M_PI, abs(M_PI * (object_z - z_cursor) * 1.8 / z_cursor_band_width))) + 0.25; + // Calculate level of detail from the object Z coordinate. + // This makes the slowly sloping surfaces to be show with high detail (with stripes), + // and the vertical surfaces to be shown with low detail (no stripes) + float z_in_cells = object_z_row * 190.; + // Gradient of Z projected on the screen. + float dx_vtc = dFdx(z_in_cells); + float dy_vtc = dFdy(z_in_cells); + float lod = clamp(0.5 * log2(max(dx_vtc * dx_vtc, dy_vtc * dy_vtc)), 0., 1.); + // Sample the Z texture. Texture coordinates are normalized to <0, 1>. + vec4 color = mix(texture2D(z_texture, vec2(z_texture_col, z_texture_row_to_normalized * (z_texture_row + 0.5 )), -10000.), + texture2D(z_texture, vec2(z_texture_col, z_texture_row_to_normalized * (z_texture_row * 2. + 1.)), 10000.), lod); + + // Mix the final color. + gl_FragColor = vec4(intensity.y, intensity.y, intensity.y, 1.0) + intensity.x * mix(color, vec4(1.0, 1.0, 0.0, 1.0), z_blend); +} diff --git a/resources/shaders/variable_layer_height.vs b/resources/shaders/variable_layer_height.vs new file mode 100644 index 000000000..2c918c0d4 --- /dev/null +++ b/resources/shaders/variable_layer_height.vs @@ -0,0 +1,46 @@ +#version 110 + +#define INTENSITY_CORRECTION 0.6 + +const vec3 LIGHT_TOP_DIR = vec3(-0.4574957, 0.4574957, 0.7624929); +#define LIGHT_TOP_DIFFUSE (0.8 * INTENSITY_CORRECTION) +#define LIGHT_TOP_SPECULAR (0.125 * INTENSITY_CORRECTION) +#define LIGHT_TOP_SHININESS 20.0 + +const vec3 LIGHT_FRONT_DIR = vec3(0.6985074, 0.1397015, 0.6985074); +#define LIGHT_FRONT_DIFFUSE (0.3 * INTENSITY_CORRECTION) +//#define LIGHT_FRONT_SPECULAR (0.0 * INTENSITY_CORRECTION) +//#define LIGHT_FRONT_SHININESS 5.0 + +#define INTENSITY_AMBIENT 0.3 + +// x = tainted, y = specular; +varying vec2 intensity; + +varying float object_z; + +void main() +{ + // First transform the normal into camera space and normalize the result. + vec3 normal = normalize(gl_NormalMatrix * gl_Normal); + + // Compute the cos of the angle between the normal and lights direction. The light is directional so the direction is constant for every vertex. + // Since these two are normalized the cosine is the dot product. We also need to clamp the result to the [0,1] range. + float NdotL = max(dot(normal, LIGHT_TOP_DIR), 0.0); + + intensity.x = INTENSITY_AMBIENT + NdotL * LIGHT_TOP_DIFFUSE; + intensity.y = 0.0; + + if (NdotL > 0.0) + intensity.y += LIGHT_TOP_SPECULAR * pow(max(dot(normal, reflect(-LIGHT_TOP_DIR, normal)), 0.0), LIGHT_TOP_SHININESS); + + // Perform the same lighting calculation for the 2nd light source (no specular) + NdotL = max(dot(normal, LIGHT_FRONT_DIR), 0.0); + + intensity.x += NdotL * LIGHT_FRONT_DIFFUSE; + + // Scaled to widths of the Z texture. + object_z = gl_Vertex.z; + + gl_Position = ftransform(); +} |