62 lines
1.6 KiB
GLSL
62 lines
1.6 KiB
GLSL
shader_type spatial;
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render_mode unshaded, cull_front;
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uniform sampler2D view2texture;
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uniform mat4 model_transform;
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uniform float fovy_degrees = 45;
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uniform float z_near = 0.01;
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uniform float z_far = 60.0;
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uniform float aspect = 1.0;
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varying vec4 global_position;
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varying vec3 normal;
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mat4 get_projection_matrix() {
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float PI = 3.14159265359;
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float rads = fovy_degrees / 2.0 * PI / 180.0;
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float deltaZ = z_far - z_near;
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float sine = sin(rads);
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if (deltaZ == 0.0 || sine == 0.0 || aspect == 0.0)
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return mat4(0.0);
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float cotangent = cos(rads) / sine;
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mat4 matrix = mat4(1.0);
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matrix[0][0] = cotangent / aspect;
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matrix[1][1] = cotangent;
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matrix[2][2] = (z_far + z_near) / deltaZ;
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matrix[2][3] = 1.0; //try +1
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matrix[3][2] = 2.0 * z_near * z_far / deltaZ;
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matrix[3][3] = 0.0;
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return matrix;
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}
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void vertex() {
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global_position = model_transform*vec4(VERTEX, 1.0);
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normal = (model_transform*vec4(NORMAL, 0.0)).xyz;
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VERTEX=vec3(UV.x, UV.y, 0.0);
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COLOR=vec4(1.0);
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}
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vec2 fix_unshaded(vec2 xy) {
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return pow(xy, vec2(2.22));
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}
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void fragment() {
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vec4 color = get_projection_matrix()*vec4(global_position.xyz, 1.0);
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color.xyz /= color.w;
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vec3 xyz = vec3(0.5-0.5*color.x, 0.5+0.5*color.y, -0.5*color.z);
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vec4 v2t = textureLod(view2texture, xyz.xy, 0.0);
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vec2 delta = v2t.xy-UV.xy;
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float visible = 0.0;
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if (color.x > -1.0 && color.x < 1.0 && color.y > -1.0 && color.y < 1.0) {
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visible = clamp(10.0*dot(normalize(normal), normalize(color.xyz)), 0.0, 1.0)*max(0.0, 1.0-4.0*pow(dot(delta, delta), 0.3));
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}
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ALBEDO = vec3(fix_unshaded(xyz.xy), visible);
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}
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