MadeOfJelly/MushMachine
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tilemap renderer now uses dithering for transparency

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This commit is contained in:
Green Sky 2020-11-04 21:02:15 +01:00
parent b162686901
commit 88f134ff8a
1 changed files with 28 additions and 2 deletions
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30
framework/opengl_renderer/src/mm/opengl/render_tasks/tilemap.cpp
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@ -73,6 +73,7 @@ void Tilemap::render(MM::Services::OpenGLRenderer& rs, MM::Engine& engine) {
glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_LESS);
glDisable(GL_BLEND);
_shader->bind();
_vertexBuffer->bind(GL_ARRAY_BUFFER);
@ -176,15 +177,40 @@ in vec2 _tex_pos;
out vec4 _out_color;
bool should_discard(vec2 screen_pos, float alpha) {
const int dither[8 * 8] = int[8 * 8](
0, 32, 8, 40, 2, 34, 10, 42,
48, 16, 56, 24, 50, 18, 58, 26,
12, 44, 4, 36, 14, 46, 6, 38,
60, 28, 52, 20, 62, 30, 54, 22,
3, 35, 11, 43, 1, 33, 9, 41,
51, 19, 59, 27, 49, 17, 57, 25,
15, 47, 7, 39, 13, 45, 5, 37,
63, 31, 55, 23, 61, 29, 53, 21
);
int mat_value = dither[int(screen_pos.x)%8 + 8 * (int(screen_pos.y)%8)];
float n_mat_value = float(mat_value) * (1.0/64.0);
return n_mat_value < 1.0 - alpha;
//return mix(n_mat_value, 1.0, alpha) < 0.5;
//return n_mat_value * alpha < 0.5;
//return alpha == 0.0;
}
void main() {
vec4 tmp_col = texture(_tex0, _tex_pos);
if (tmp_col.a == 0.0) {
//if (tmp_col.a == 0.0) {
if (should_discard(gl_FragCoord.xy, tmp_col.a)) {
discard;
}
//_out_color = tmp_col;
_out_color = vec4(tmp_col.rgb * _ambient_color, tmp_col.a);
//_out_color = vec4(tmp_col.rgb * _ambient_color, tmp_col.a);
_out_color = vec4(tmp_col.rgb * _ambient_color, 1.0);
}
)")
}