glsl

问题 I'm currently drawing thousands of circles, instancing a circle geometry (many triangles). alternatively, I could simply instance a quad (2 triangles), but cut out a circle in the fragment shader, using a distance function and discard . which approach would be faster? -- is drawing many triangles more expensive than the calculations done in the fragment shader? 回答1: The fastest way might depend on the GPU and lots of other factors like how you're drawing the circles, 2D, 3D, are you blending

问题 I'm using three.js to create an interactive data visualisation. This visualisation involves rendering 68000 nodes, where each different node has a different size and color. Initially I tried to do this by rendering meshes, but that proved to be very expensive. My current attempt is to use a three.js particle system, with each point being a node in the visualisation. I can control the color * size of the point, but only to a certain point. On my card, the maximum size for a gl point seems to

问题 I'm using three.js to create an interactive data visualisation. This visualisation involves rendering 68000 nodes, where each different node has a different size and color. Initially I tried to do this by rendering meshes, but that proved to be very expensive. My current attempt is to use a three.js particle system, with each point being a node in the visualisation. I can control the color * size of the point, but only to a certain point. On my card, the maximum size for a gl point seems to

问题 I'm trying to draw a triangle using an OpenGL fragment shader. I succeeded in drawing a circle but I have a problem with handling the equation/logic or the code to draw a triangle. draw_triangle(vec2 v1 , vec2 v2, vec2 v3) Here is the fragment shader: #version 330 core out vec4 frag_color; void draw_circle(vec2 shift_val, int radius,int color) { vec2 res = vec2(1280,720); vec2 norm_cord = gl_FragCoord.xy; float dist = length(norm_cord - (res*shift_val)); if( dist < radius ) { if( color ==1 )

问题 I'm trying to draw a triangle using an OpenGL fragment shader. I succeeded in drawing a circle but I have a problem with handling the equation/logic or the code to draw a triangle. draw_triangle(vec2 v1 , vec2 v2, vec2 v3) Here is the fragment shader: #version 330 core out vec4 frag_color; void draw_circle(vec2 shift_val, int radius,int color) { vec2 res = vec2(1280,720); vec2 norm_cord = gl_FragCoord.xy; float dist = length(norm_cord - (res*shift_val)); if( dist < radius ) { if( color ==1 )

问题 I'm trying to draw a triangle using an OpenGL fragment shader. I succeeded in drawing a circle but I have a problem with handling the equation/logic or the code to draw a triangle. draw_triangle(vec2 v1 , vec2 v2, vec2 v3) Here is the fragment shader: #version 330 core out vec4 frag_color; void draw_circle(vec2 shift_val, int radius,int color) { vec2 res = vec2(1280,720); vec2 norm_cord = gl_FragCoord.xy; float dist = length(norm_cord - (res*shift_val)); if( dist < radius ) { if( color ==1 )

问题 I'm trying to draw a triangle using an OpenGL fragment shader. I succeeded in drawing a circle but I have a problem with handling the equation/logic or the code to draw a triangle. draw_triangle(vec2 v1 , vec2 v2, vec2 v3) Here is the fragment shader: #version 330 core out vec4 frag_color; void draw_circle(vec2 shift_val, int radius,int color) { vec2 res = vec2(1280,720); vec2 norm_cord = gl_FragCoord.xy; float dist = length(norm_cord - (res*shift_val)); if( dist < radius ) { if( color ==1 )

问题 I'm trying to draw a triangle using an OpenGL fragment shader. I succeeded in drawing a circle but I have a problem with handling the equation/logic or the code to draw a triangle. draw_triangle(vec2 v1 , vec2 v2, vec2 v3) Here is the fragment shader: #version 330 core out vec4 frag_color; void draw_circle(vec2 shift_val, int radius,int color) { vec2 res = vec2(1280,720); vec2 norm_cord = gl_FragCoord.xy; float dist = length(norm_cord - (res*shift_val)); if( dist < radius ) { if( color ==1 )

问题 I went through different sources and seen that we could draw a dotted line using a fragment shader. Because I am new to OpenGL I couldn't able to understand. Can anyone share some code sample that plot dotted or dashed line using fragment shader and GL_LINE_STRIP in Android. References: Dashed line in OpenGL3? Dotted back edges of object 回答1: Line stipple is not supported in OpenGL ES. If you use OpenGL ES 1.00, then you can use the approach which is presented in the answers to OpenGL ES -

来源： https://stackoverflow.com/questions/64499166/shadertoys-fragcoord-xy-value-and-more