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Update shaders_julia_set.c

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This commit is contained in:
Ray 2019-05-15 12:53:13 +02:00
parent ab44033ed6
commit d878a0aecb
1 changed files with 15 additions and 12 deletions
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27
examples/shaders/shaders_julia_set.c
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@ -18,8 +18,6 @@
#include "raylib.h"
#include "raymath.h"
// A few good julia sets
const float POINTS_OF_INTEREST[6][2] =
{
@ -48,7 +46,8 @@ int main()
float c[2] = { POINTS_OF_INTEREST[0][0], POINTS_OF_INTEREST[0][1] };
// Offset and zoom to draw the julia set at. (centered on screen and 1.6 times smaller)
float offset[2] = { -(float)screenWidth/2, -(float)screenHeight/2 };
float offset[2] = { -(float)screenWidth/2, -(float)screenHeight/2 };
float targetOffset[2] = { offset[0], offset[1] };
float zoom = 1.6f;
// Get variable (uniform) locations on the shader to connect with the program
@ -107,21 +106,25 @@ int main()
if (IsKeyDown(KEY_RIGHT)) incrementSpeed++;
else if (IsKeyDown(KEY_LEFT)) incrementSpeed--;
// Use mouse wheel to change zoom
zoom -= (float)GetMouseWheelMove()/10.f;
SetShaderValue(shader, zoomLoc, &zoom, UNIFORM_FLOAT);
// Use mouse button to change offset
if (IsMouseButtonDown(MOUSE_LEFT_BUTTON))
{
if (IsKeyDown(KEY_LEFT_SHIFT)) zoom -= 0.002f;
else zoom += 0.002f;
// TODO: Logic is not correct, the idea is getting zoom focus to pointed area
Vector2 mousePos = GetMousePosition();
offset[0] = mousePos.x -(float)screenWidth;
offset[1] = mousePos.y -(float)screenHeight;
SetShaderValue(shader, offsetLoc, offset, UNIFORM_VEC2);
targetOffset[0] = mousePos.x -(float)screenWidth;
targetOffset[1] = mousePos.y -(float)screenHeight;
}
// Slowly move camera to targetOffset
offset[0] += GetFrameTime()*2.0f*(targetOffset[0] - offset[0]);
offset[1] += GetFrameTime()*2.0f*(targetOffset[1] - offset[1]);
SetShaderValue(shader, zoomLoc, &zoom, UNIFORM_FLOAT);
SetShaderValue(shader, offsetLoc, offset, UNIFORM_VEC2);
// Increment c value with time
float amount = GetFrameTime()*incrementSpeed*0.0005f;
@ -150,7 +153,7 @@ int main()
EndTextureMode();
// Draw the saved texture (rendered julia set)
DrawTextureRec(target.texture, (Rectangle){ 0, 0, target.texture.width, -target.texture.height }, Vector2Zero(), WHITE);
DrawTextureRec(target.texture, (Rectangle){ 0, 0, target.texture.width, -target.texture.height }, (Vector2){ 0.0f, 0.0f }, WHITE);
// Draw information
//DrawText( FormatText("cx: %f\ncy: %f\nspeed: %d", c[0], c[1], incrementSpeed), 10, 10, 10, RAYWHITE);